CN203466130U - Additional electronic unit of multifunctional ac contactor - Google Patents

Abstract

The utility model relates to an additional electronic unit of a multifunctional ac contactor. The additional electronic unit includes a three-end network which comprises a first input end (N1), a first output end (P1) and a common end (E), wherein the first input end N1 is connected with one end of a voltage control switching circuit, the other end of the voltage control switching circuit is connected with the first output end (P1) and one end of an energy storage circuit (C), and the other end of the energy storage circuit (C), a second input end (N2) and a second put end (P2) are connected to form the common end (E).

Description

The additional electron unit of multifunctional ac contactor

Technical field

The utility model relates to Low Voltage Electrical Apparatus, relates in particular to a kind of " additional electron unit of multifunctional ac contactor " with the powerful adhesive of having concurrently of electronics technological transformation, economize on electricity noise elimination, the anti-thunder several functions of lightning protection.

Background technology

A.C. contactor is a kind of application low-voltage electrical apparatus very widely, and the A.C. contactor that ends 2012 Nian， China on-line operations reaches 1,000,000,000, and to increase every year the speed increase of 8,000 ten thousand newly.Its operation principle is to utilize electromagnet to drive moving contact (make contact) closed or separated with fixed contact (break contact), reaches the object that switches on or off circuit.It is applicable to starting or controls 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 is mainly 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 voltage (being generally called below AC220V, AC110V or AC380V is AC voltage or field power supply), moving iron core is subject 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 voltage on magnet exciting coil disconnects, moving iron core loss of excitation is also subject to the effect of back-moving spring and separated with static iron core, and make contact resets and disconnects, and external circuit is just cut off thereupon.

In sum, the course of work of this traditional A.C. contactor can be divided into " adhesive ", " sticking ", " reset " three phases:

1, adhesive: magnet exciting coil and AC voltage are connected, dynamic and static iron core adhesive.In this stage, for overcoming the moving inertia of iron core and the elastic force of back-moving spring, field power supply must provide larger power (being " adhesive power " hereinafter referred to as this power), the adhesive mutually of dynamic and static iron core ability, and " adhesive power " is larger, and adhesive is more simply quicker;

2, sticking: magnet exciting coil continues to connect with AC voltage, and dynamic and static iron core continues to keep the state of adhesive.In this stage, field power supply need only provide less power (being " holding power " hereinafter referred to as this power), and dynamic and static iron core also can continue adhesive.If in this stage, field power supply provides excessive holding power, will cause waste of energy and cause A.C. contactor unnecessary heating up;

3, reset: magnet exciting coil disconnects AC voltage, dynamic and static iron core " reset " separation.

The purposes of A.C. contactor varies, and structure also varies, but their operation principle is all identical with Fig. 1.

Because adhesive all passes to identical AC voltage with sticking stage magnet exciting coil, therefore there is following critical defect in traditional A.C. contactor:

1, meaningless power consumption: front already described, in adhesive and sticking stage, in the magnet exciting coil of traditional A.C. contactor, all pass to " identical " AC voltage, make holding power excessive, caused meaningless electric energy loss;

2, heating: the disastrous effect of meaningless electric energy loss institute association is " heating heats up ", when serious, even can burn the magnet exciting coil of traditional A.C. contactor;

3, the quality " with fortune " of adhesive action: in the moment of magnet exciting coil connection AC voltage, when the instantaneous value of AC voltage is higher, the powerful adhesive of described conventional AC contactor; On the contrary, described magnet exciting coil is connected the moment of AC voltage, when the instantaneous value of AC voltage is lower, and the slow adhesive of described conventional AC contactor, in the case, its make contact or break contact just may seriously burn because striking sparks;

4, there is annoying AC noise;

5, power factor (PF) is low.

The critical defect existing for traditional A.C. contactor, the technical staff in electronics, electrical apparatus industry studies, has designed multiple for improving " electricity-saving circuit ", " electricity-saving appliance ", " energy saving ac contactor " of traditional A.C. contactor performance." a kind of energy saving ac contactor " that " energy-saving alternating current contactor unit ", the application number that Chinese Patent Application No. is 97216246.1 " high-effect energy-saving ac contactor ", application number is 94202133.9 is 201010144412.4 discloses patent applicant's achievement in research separately; Hangzhou, Changzhou, Zhuhai Deng Di universities and colleges or manufacturer are also useful on " electricity-saving appliance " appearance that improves conventional AC contactor performance.

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 defect below ubiquity:

1, complex structure, is difficult to carry out;

2, electronic device used is too many, and electronic circuit is too complicated; Adopt monolithic processor controlled " economizer of AC. contactor " 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 " mistake control-this mistake control can breed disaster in some occasion!

3, the product price that enforcement is produced is too high, and the price of the QXJB type economizer of AC. contactor that for example Zhuhai City, Guangdong Province Co., Ltd produces 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 user very few.

4, because electronic circuit is complicated, electronic device used is many, and therefore, the economize on electricity of A.C. contactor is controlled part and is difficult to become one with A.C. contactor, and part is controlled in described economize on electricity must separately establish a box, causes user installation inconvenience, wiring trouble.

5, because electronic circuit is complicated, electronic device used is many, therefore, the power consumption (AC-DC transition loss, IC power consumption, actuator power consumption etc.) that part self is controlled in the economize on electricity of A.C. contactor will increase, and what have is even large to the stage comparable with the holding power of small-size contactor.

Just because of prior art, there is above defect, so there is following situation: " 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 at present on user uses.Main cause is that power-saving contactor price is more expensive, user can't accept in disposable input, await country and in the popularization of energy-saving type contactor, strengthen policy dynamics, promote the extensive use of energy-saving type contactor " (list of references 1: money Jinchuan etc. alternating-current contactor energy-saving technology summary. the 4th phase of the market conditions .2011 of China Electronics).

Present situation for prior art, the utility model want Da to target be: grasping " to essence must be to letter; have simple and practical ability only and spread for a long time " and the aim of " not having best; only have better ", " application electric technology; rebuild traditional industry ", design a kind of electronic circuit as far as possible device simple, used try one's best honest and clean, the performance of few, price of trying one's best surpass prior art, " to essence to letter ", have concurrently by " the multifunction electric subtype A.C. contactor " of the several functions such as powerful adhesive, economize on electricity noise elimination, the anti-thunder of lightning protection.

Utility model content

An additional electron unit for multifunctional ac contactor, described additional electron unit is four port networks, comprises first input end, the second input, the first output and the second output; Wherein, first input end connects one end of pressuring controling switch circuit, and the other end of pressuring controling switch circuit connects one end of the first output and accumulator, and the other end of accumulator, the second input, the second output connect and compose common port jointly.

A kind of multifunction electric subtype A.C. contactor, comprise additional electron unit and conventional AC contactor two parts that formed by break contact DD, make contact DH, moving iron core M, static iron core G, back-moving spring F, magnet exciting coil, it is characterized in that: described additional electron unit is provided with N1, N2, P1, tetra-ports of P2, is four port networks; Port N1, N2 are two input port, and P1, P2 are two output port; Input port N1, N2 are connected with S1, the S2 end of AC voltage respectively, and output port P1, P2 hold and are connected with A1, the A2 of described magnet exciting coil L respectively; Its theory structure mode is divided into:

Anti-thunder mode one: be provided with anti lightning road in described additional electron unit, it is comprised of N1 end, pressuring controling switch circuit, P1 end, accumulator, P2 end, common port E end, N2 end and anti lightning road; Described P2 end, N2 end are all connected with common port E end; One of described pressuring controling switch circuit termination N1 end, another termination P1 end; One of described accumulator termination P1 end, another termination P2 end; One of described anti lightning road termination N1 end, another termination N2 end;

Anti-thunder mode two: be also provided with anti lightning road in described additional electron unit, it is comprised of N1 end, common port E end, P1 end, accumulator, P2 end, pressuring controling switch circuit, N2 end and anti lightning road; Described P1 end, N1 end are all connected with common port E end; One of described accumulator termination P1 end, another termination P2 end; One of described pressuring controling switch circuit termination P2 end, another termination N2 end; One of described anti lightning road termination N1 end, another termination N2 end;

Omission mode one: described additional electron unit has omitted anti lightning road, it is comprised of N1 end, common port E end, P1 end, accumulator, P2 end, pressuring controling switch circuit and N2 end; Described P1 end, N1 end are all connected with common port E end; One of described accumulator termination P1 end, another termination P2 end; One of described pressuring controling switch circuit termination P2 end, another termination N2 end;

Omission mode two: described additional electron unit has also omitted anti lightning road, it is comprised of N1 end, pressuring controling switch circuit, P1 end, accumulator, P2 end, common port E end and N2 end; Described P2 end, N2 end are all connected with common port E end; One of described pressuring controling switch circuit termination N1 end, another termination P1 end; One of described accumulator termination P1 end, another termination P2 end.

Described additional electron unit and conventional AC contactor are combined by described mode, can form novel " multifunction electric gives type A.C. contactor ".

Described pressuring controling switch circuit by ambipolar transient voltage suppressor diode TVS1 form, accumulator by capacitor C form, the ambipolar transient voltage suppressor diode TVS2 of anti lightning route forms.

The circuit structure mode of described additional electron unit is divided into:

Anti-thunder mode one: described additional electron unit is comprised of N1 end, ambipolar transient voltage suppressor diode TVS1, P1 end, capacitor C, P2 end, common port E end, N2 end and ambipolar transient voltage suppressor diode TVS2; One of described ambipolar transient voltage suppressor diode TVS1 termination N1 end, another termination P1 end; One of described capacitor C termination P1 end, other end P2 end; One of described ambipolar transient voltage suppressor diode TVS2 termination N1 end, another termination N2 end; P2, N2 all connect common port E end;

Anti-thunder mode two: described additional electron unit is comprised of N1 end, common port E end, P1 end, capacitor C, P2 end, ambipolar transient voltage suppressor diode TVS1, N2 end and ambipolar transient voltage suppressor diode TVS2; Described N1, P1 end all connects common port E end; One of described capacitor C termination P1 end, another termination P2 end; One of described ambipolar transient voltage suppressor diode TVS1 termination P2 end, another termination N2 end; One of described ambipolar transient voltage suppressor diode TVS2 termination N1 end, another termination N2 end;

Omission mode one: N1 end, common port E end, P1 end, capacitor C, P2 end, ambipolar transient voltage suppressor diode TVS1, N2 end are in series successively and form described additional electron unit;

Omission mode two: described additional electron unit is in series and forms successively by N1 end, ambipolar transient voltage suppressor diode TVS1, P1 end, capacitor C, P2 end, common port E end, N2 end.

Described additional electron unit has the function of automatic discriminating to the AC voltage of random connection: when the instantaneous value of AC voltage is less than the threshold voltage of described pressuring controling switch circuit, and not adhesive of A.C. contactor; Otherwise, when the instantaneous value of AC voltage is greater than described threshold voltage, adhesive power that it provides when enough large, the powerful adhesive of A.C. contactor.

Described anti lightning road and AC voltage are in parallel, the input N1 end of one termination additional electron unit, and other end attachment adds the input N2 end of electronic unit; It is characterized in that: before thunder and lightning arrives described N1, N2 end, it is in open-circuit condition; When thunder and lightning arrives the puncture voltage UT2 of N1, N2 end and the ambipolar transient voltage suppressor diode TVS2 of lightning voltage >, its short circuit conducting.

Application the utility model, can obtain following beneficial effect:

1, inexpensive: in the utility model for improvement of conventional AC contactor performance to essence to letter " additional electron unit ", only have ambipolar transient voltage suppressor diode TVS1, ambipolar transient voltage suppressor diode TVS2, three electronic components of capacitor C, total cost is less than 0.4 yuan.In the occasion that does not need anti-thunder, " additional electron unit " only has ambipolar transient voltage suppressor diode TVS1, two electronic components of capacitor C.Only spend several maos, just can make conventional AC contactor be promoted to " multifunction electric gives type A.C. contactor " of premium properties, solved the problem that list of references 1 discloses: " China's electricity-saving type A.C. contactor has had certain market at present; but universal not enough, traditional A.C. contactor is occupied an leading position at present on user uses.Main cause is that power-saving contactor price is more expensive, user can't accept in disposable input, await country and in the popularization of energy-saving type contactor, strengthen policy dynamics, promote the extensive use of energy-saving type contactor ", for electricity-saving type A.C. contactor spread has been created condition;

2, thing is beautiful: the volume of above-mentioned several electronic components is all fine, they can be integrated into the inside of conventional AC contactor, manufactures the electricity-saving type A.C. contactor integrated, outward appearance is pleasing.This point, prior art all too far behind to catch up, be difficult to accomplish;

3, reliable: the quantity of the reliability of electronic product and electronic device used is inversely proportional to, price is directly proportional to the quantity of electronic device used.Electronic device used is more, and electronic circuit is more complicated, just means that reliability is lower, price is higher.The utility model is only used two (or three) electronic devices, and is all the power-type device of not being afraid of electromagnetic interference that forceful electric power is used, and therefore, not only cost is low, and reliability is high;

4, lengthen the life: a traditional CJX2-0910 A.C. contactor, a CJX2-0910 A.C. contactor with the same model of " additional electron unit " of the present utility model transformation, the same place that is 34 ℃ in room temperature was moved after 10 hours simultaneously, the temperature on the former surface has surpassed 60 ℃, touches scalding one's hand; The latter, the temperature on surface is still room temperature.Temperature rise is the formidable enemy of electronics, electric equipment products, and temperature rise is higher, and the useful life of product is just shorter, otherwise just can extend useful life.Therefore, the utlity model has and extend product " lengthening the life " function in useful life;

5, quick: the utility model is provided with " threshold voltage ", AC voltage is greater than " threshold voltage ", " adhesive power " when enough large, and A.C. contactor is just done adhesive and moved.Therefore, the utility model adhesive action is strong and powerful, clear, sucting speed is fast.The advantage of the utility model quick pick-up, can reduce contact electric arc, prevent that contact from burning inefficacy, to protection contact, extend the contactor life-span and there is important effect.

6, economize on electricity: temperature rise is low, is the visualize of economize on electricity, and measured result also shows, the utlity model has higher electric energy.

In order to survey electric energy of the present utility model, just made model machine (only need several electronic components, model machine is easy to do), with " EPM8200 multifunctional electrical parameter measuring instrument ", measure respectively the index of following two kinds of A.C. contactors:

(1) the CJX2-0910 type conventional AC contactor (hereinafter to be referred as traditional part) that, does not add the utility model it " additional electron unit ";

(2), by method described in the utility model, described CJX2-0910 type conventional AC contactor adds novel " multifunction electric subtype A.C. contactor " (hereinafter to be referred as the utility model) that transformation forms after " additional electron unit ".

Result is as shown in table 1 below: table 1

Above measured result shows: " active power power saving rate " of the present utility model reaches 68%, and " apparent power power saving rate " reaches 87%.

After application the utility model, every CJX2-0910 type A.C. contactor can power saving 8.8va.1,000,000,000 A.C. contactors in the whole nation (all by the calculating of CJX2-0910 type) can power saving 8,800,000 Kva, and the total installation of generating capacity in power station, hydraulic engineering-Yangtze River Gorges the biggest in the world is 1,820 ten thousand Kva.If 1,000,000,000 A.C. contactors in the whole nation are all applied this patent, be equivalent to build power station, nearly half Yangtze River Gorges, shown the large economic and social profit of tool that the utility model contains!

7, noise elimination.After nineteen twenty-four, the first in the world A.C. contactor was born, AC noise and A.C. contactor with regard to " as shade with ", industry Inner personnel reach the stage of " customary, face the fearful with no fears " to the AC noise of conventional AC contactor.The utility model can be accomplished quiet noiseless, even in the dead of night, also can't hear noise, makes industry Inner onlooker express one's surprise, wonder, etc in fact.

8, anti-thunder.The anti-thunder of the utility model ambipolar transient voltage suppressor diode TVS2 used 10 psecs after thunder and lightning arrives are 10ps(picosecond, and 1 psec equals trillionth second) internal short-circuit conducting, can effectively resist the thunder and lightning importing into from AC power supplies.

9, rise PF.Front already described, measured result shows: the power factor (PF) of conventional AC contactor (Power factor is PF) is only 0.277, and after application the utility model, PF rises to 0.682.

Accompanying drawing explanation

Fig. 1 is the fundamental diagram of conventional AC contactor;

Fig. 2 is the functional-block diagram of embodiment 1;

Fig. 3 is the circuit theory diagrams of embodiment 1;

Fig. 4 is AC voltage oscillogram;

Fig. 5 is the working state figure of embodiment 1 in t2～t3 time domain:

Fig. 6 is the working state figure of embodiment 1 when t=th:

Fig. 7 is the working state figure of embodiment 1 when t=t3:

Fig. 8 is the working state figure of embodiment 1 in t3～t4 time domain:

Fig. 9 is the working state figure of embodiment 1 when t=t4:

Figure 10 is the working state figure of embodiment 1 in t5～t6 time domain:

Figure 11 is the working state figure of embodiment 1 when t=t6:

Figure 12 is the working state figure of embodiment 1 in t6～t7 time domain:

Figure 13 is the functional-block diagram of embodiment 2:

Figure 14 is the circuit theory diagrams of embodiment 2;

Figure 15 is the functional-block diagram of embodiment 3:

Figure 16 is the circuit theory diagrams of embodiment 3;

Figure 17 is the functional-block diagram of embodiment 4:

Figure 18 is the circuit theory diagrams of embodiment 4.

Embodiment

Below in conjunction with accompanying drawing, execution mode of the present utility model is described.

Fig. 2 is the functional-block diagram of embodiment 1 that is provided with the utility model on anti lightning road, and Fig. 3 is the circuit theory diagrams of embodiment 1.In Fig. 2, Fig. 3: L is the magnet exciting coil in conventional AC contactor, two connectivity ports that A1, A2 are it; Dashed rectangle 100 represents additional electron of the present utility model unit, and it is that to have two inputs be that N1 is four port networks that P1 and P2 hold with N2 end, two outputs; In described additional electron unit 100 101 is that pressuring controling switch circuit, 102 is that accumulator, 103 is anti lightning road.

In conjunction with Fig. 2; A kind of multifunction electric subtype A.C. contactor, comprise additional electron unit 100 and conventional AC contactor two parts that formed by break contact DD, make contact DH, moving iron core M, static iron core G, back-moving spring F, magnet exciting coil L, it is characterized in that: there are N1, N2, P1, tetra-ports of P2 in described additional electron unit 100, is four port networks; Port N1, N2 are two input port, and P1, P2 are two output port; Its theory structure and connected mode are: described additional electron unit 100 is comprised of N1 end, pressuring controling switch circuit 101, P1 end, accumulator 102, P2 end, common port E end, N2 end and anti lightning road 103; One of described pressuring controling switch circuit 101 termination N1 end, another termination P1 end; One of described accumulator 102 termination P1 end, another termination P2 end; One of described anti lightning road 103 termination N1 end, another termination N2 end; Described P2 end, N2 end are all connected with common port E end; Input port N1, N2 are connected with S1, the S2 end of AC voltage respectively, and output port P1, P2 are connected with A1, the A2 end of magnet exciting coil L respectively.

Described additional electron unit 100 is combined by described mode with conventional AC contactor, can form novel " multifunction electric gives type A.C. contactor ".

Again in conjunction with Fig. 2, Fig. 3: described pressuring controling switch circuit 101 by ambipolar transient voltage suppressor diode TVS1 form, accumulator 102 by capacitor C form, anti lightning road 103 is comprised of ambipolar transient voltage suppressor diode TVS2.

The circuit structure of the present embodiment 1 is: described additional electron unit 100 is comprised of N1 end, ambipolar transient voltage suppressor diode TVS1, P1 end, capacitor C, P2 end, common port E end, N2 end and ambipolar transient voltage suppressor diode TVS2; One of described ambipolar transient voltage suppressor diode TVS1 termination N1 end, another termination P1 end; One of described capacitor C termination P1 end, other end P2 end; One of described ambipolar transient voltage suppressor diode TVS2 termination N1 end, another termination N2 end; P2, N2 all connect common port E end;

Below in conjunction with accompanying drawing, set forth the course of work of the present embodiment 1:

It will be apparent to those skilled in the art: the ambipolar transient voltage suppressor diode TVS2 in anti lightning road 103 is before thunder and lightning arrives N1, N2 end, and it is in open-circuit condition, and therefore, when setting forth the course of work of the present embodiment 1, visual its " do not exist ".

In conjunction with Fig. 2, Fig. 3, Fig. 4: from the mathematic(al) representation of the AC voltage of S1, S2 end input be:

u=Umsin（2πft＋φ）

In above formula: u is the instantaneous value of AC voltage, Um is the amplitude of AC voltage, and f is the frequency of AC voltage, and φ is the initial phase angle of AC voltage.

For concise explanation, now suppose initial phase angle φ=0, the expression formula of the instantaneous value u of AC voltage is: u=Umsin2 π ft

Its waveform as shown in Figure 4.In figure: t represents the time.

During t=t1, AC voltage is connected, and now, before the connection of AC voltage, capacitor C and magnet exciting coil L electric discharge all finish, therefore the voltage at capacitor C two ends (being the output voltage of additional electron unit 100) UC=0; At this t=t1 constantly, the instantaneous value of AC voltage:

u1＝Umsin2πft1＜UT1

In above formula, UT1 is the puncture voltage (being threshold voltage hereinafter referred to as this puncture voltage UT1) of ambipolar transient voltage suppressor diode TVS1.

Due to u1=Umsin2 π ft1 < UT1 event, ambipolar transient voltage suppressor diode TVS1 is equivalent to open circuit, the output voltage U C=0 of additional electron unit 100, not adhesive of A.C. contactor.

In conjunction with Fig. 1, professional and technical personnel should be clear: if it is upper that the instantaneous value u1=Umsin2 π ft1 of t=t1 AC voltage constantly is directly applied to the magnet exciting coil L of conventional AC contactor, may produce one of following bad phenomenon:

1, the value of u1 is too low, and its magnetic force producing is less than the elastic force of back-moving spring F, A.C. contactor power consumption in vain and not adhesive;

2, the value of u1 is large not, and its magnetic force producing is only slightly larger than the elastic force of back-moving spring F, the inadequate and slow ground adhesive of A.C. contactor, and its contact is because the sparking time is compared with the long scaling loss that subjects to.

Above-mentioned phenomenon is one of shortcoming of conventional AC contactor.

In conjunction with Fig. 3, Fig. 4: during t=t2, the instantaneous value of AC voltage:

u2＝Umsin2πft2＞UT1

Ambipolar transient voltage suppressor diode TVS1 punctures conducting, is equivalent to short circuit.Again in conjunction with Fig. 3, Fig. 4, Fig. 5, because ambipolar transient voltage suppressor diode TVS1 punctures conducting, the charging current i23 that AC voltage just provides, capacitor C, magnet exciting coil L just obtain respectively the charging current of ic23, iL23.

In conjunction with Fig. 4, Fig. 6, during to t=th, the charging current that AC voltage provides is Ih, and capacitor C, magnet exciting coil L obtain respectively the charging current of Ich, ILh.

Additional electron unit 100 output voltages are that the voltage at capacitor C or magnet exciting coil L two ends is enough high, are:

Uch＝uh＝Umsin2πfth

In above formula, Uch represents the output voltage of additional electron unit 100 when t=th.

During t=th, AC voltage has ordered about magnet exciting coil L, and to have obtained enough strong charging current be exciting current ILh, under the effect of enough enough large adhesive power large, that enough strong Uch, ILh produces, and just powerful adhesive enter sticking state of A.C. contactor.

Analyze so far, can reach a conclusion: the random AC voltage of connecting in 100 pairs of additional electron unit has the function of automatic discriminating: when the instantaneous value u=Umsin2 of AC voltage π ft < UT1(is threshold voltage) time, the voltage U C=0 of described additional electron unit 100 outputs, not adhesive of A.C. contactor; When the instantaneous value u=Umsin2 of AC voltage π ft > UT1, ambipolar transient voltage suppressor diode TVS1 puncture adhesive power that conducting, AC voltage provide when enough large, just powerful adhesive of A.C. contactor.

In brief: the random AC voltage of connecting in 100 pairs of additional electron unit has the function of automatic discriminating: when the instantaneous value of AC voltage is less than threshold voltage UT1, not adhesive of A.C. contactor; Otherwise, when the instantaneous value of AC voltage is greater than threshold voltage UT1, its adhesive power providing when enough large, just powerful adhesive of A.C. contactor.

Therefore,, as long as select the sufficiently high ambipolar transient voltage suppressor diode TVS1 of UT1, can guarantee that A.C. contactor adhesive is strong and powerful.

Be provided with threshold voltage, can guarantee that A.C. contactor adhesive is strong and powerful, clear, sucting speed is fast.The feature of the utility model quick pick-up; can reduce contact electric arc, prevent that contact from burning inefficacy; to protecting contact, prolongation A.C. contactor life-span to there is important effect, be the important function of the utility model, be also one of significant advantage of the utility model.

In conjunction with Fig. 4, Fig. 7, during t=t3, AC voltage is low level positive half cycle in S1 end for high level, S2 hold again, and S1 holds as anode, S2 end are negative terminal, and its instantaneous value is u3=Umsin2 π ft3;

The voltage at capacitor C two ends is charged to UC3, and the voltage at ambipolar transient voltage suppressor diode TVS1 two ends is that u3-UC3=Umsin2 π ft3-UC3 < UT1 makes that it turn-offs, it is equivalent to open circuit.

Again in conjunction with Fig. 4, Fig. 8, in the time domain of t3～t4:

Because ambipolar transient voltage suppressor diode TVS1 turn-offs, it is equivalent to open circuit, therefore, be equivalent to additional electron unit 100 and disconnect with AC voltage;

Before AC voltage disconnects, capacitor C and magnet exciting coil L all contain electric energy;

Energy is released in capacitor C electric discharge, and its discharging current is ic34; Because the electric current on magnet exciting coil L can not suddenly change, therefore it take electric current as iL34 " afterflow "; Both numerical value of freewheel current iL34 of the discharging current ic34 of capacitor C, magnet exciting coil L equate, direction complementation, and A.C. contactor is with capacitor C and the complementary electric discharge of magnet exciting coil L and continue to keep sticking state.

In other words: in the time domain of turn-offing at ambipolar transient voltage suppressor diode TVS1, A.C. contactor relies on the electric energy of capacitor C and magnet exciting coil L storage and maintains sticking state.

In conjunction with Fig. 4, Fig. 9, during t=t4:

AC voltage is low level negative half period in S2 end for high level, S1 hold, and S2 holds as anode, S1 end are negative terminal, and its instantaneous value is u4=Umsin2 π ft4;

As previously mentioned, in the time domain of the t3～t4 at t=t4 before the moment, capacitor C is discharged to magnet exciting coil L, while being discharged to t=t4, because the voltage on electric capacity can not suddenly change, thus capacitor C remain P1 end for just, P2 end for negative voltage U c4(herein, claim that voltage U c4 is " residual voltage ");

Now, the voltage at ambipolar transient voltage suppressor diode TVS1 two ends is:

Uc4＋u4＝Uc4＋Umsin2πft4＞UT1

Ambipolar transient voltage suppressor diode TVS1 punctures conducting, is equivalent to short circuit; AC voltage is again to capacitor C charging, and charging current is ic45a;

Set forth so far, in conjunction with Fig. 4, it is again emphasized that: AC voltage by just half circumferentially " zero crossing " of negative half period transition be the t=t10 point in t3～t4 time domain, AC voltage be zero but capacitor C remain P1 end for just, P2 end is negative voltage.

Approaching t=t4 constantly in, the freewheel current of magnet exciting coil L is iL45, because the electric current on inductance can not suddenly change, therefore t=t4 constantly after, it is still by former direction afterflow.According to the polarity of AC voltage now, the charging current i45 of AC Voltage-output can not provide this afterflow iL45, and now the residual voltage Uc4 in capacitor C just in time can provide described afterflow iL45, therefore the residual voltage Uc4 in capacitor C is not the path by TVS1-N1-S1-S2, not by the electric discharge of AC voltage (if so, power factor will decline) but by the path of P1-L-P2, with discharging current ic45b=iL45 and the complementary electric discharge of magnet exciting coil L, make magnetic coil L keep " afterflow ".This is that power factor of the present utility model is far above the major reason of the power factor of conventional AC contactor.Power factor is high, is the important function of the utility model, is also one of significant advantage of the utility model.

During to t=t5, " afterflow " current i L45 of magnet exciting coil L is progressively down to zero, and the utility model enters the represented state of Figure 10: the charging current i56 that AC voltage provides, capacitor C, magnet exciting coil L obtain respectively the charging current of ic56, iL56.

In conjunction with Fig. 4, Figure 11, during t=t6, AC voltage is the negative half period of high level in S1 end for low level, S2 hold, and S1 end is that negative terminal, S2 end are anode, and its instantaneous value is u6=Umsin2 π ft6; The voltage at capacitor C two ends is charged to UC6, and the voltage at ambipolar transient voltage suppressor diode TVS1 two ends is:

U6-UC6=Umsin2 π ft6-UC6 < UT1 and make that it turn-offs, it is equivalent to open circuit.

In conjunction with Fig. 4, Figure 12, in the time domain of t6～t7: because ambipolar transient voltage suppressor diode TVS1 turn-offs, it is equivalent to open circuit, therefore, be equivalent to additional electron unit 100 and disconnect with AC voltage;

Before AC voltage disconnects, capacitor C and magnet exciting coil L all contain electric energy;

Energy is released in capacitor C electric discharge, and its discharging current is ic67; Because the electric current on magnet exciting coil L can not suddenly change, therefore it take electric current as iL67 " afterflow "; Both numerical value of freewheel current iL67 of the discharging current ic67 of capacitor C, magnet exciting coil L equate, direction complementation, and A.C. contactor is with capacitor C and the complementary electric discharge of magnet exciting coil L and continue to keep sticking state.

Set forth so far, in conjunction with Fig. 4, Figure 12, it is again emphasized that: at AC voltage, by negative half period, to " zero crossing " of positive half cycle transition, be the t=t20 point in t6～t7 time domain, AC voltage be zero but capacitor C remain P1 end for negative, P2 end be positive voltage.

During to t=t7, the voltage at ambipolar transient voltage suppressor diode TVS1 two ends is greater than its threshold voltage UT1, and it punctures again conducting, and capacitor C and magnet exciting coil enter again the state of charging energy-storing.So repetitive cycling, can guarantee that A.C. contactor keeps stable sticking state.

The check analysis of the present embodiment and conventional AC contactor:

One, adhesive

The present embodiment has selected to have the ambipolar transient voltage suppressor diode TVS1 of suitable threshold voltage UT1, in capacitor C the voltage magnetic force that enough high, magnet exciting coil L produces enough strong, while being enough to forcefully rapidly pull-core, the powerful adhesive of the present embodiment.

Front already described, this function of the present embodiment is epochmaking, and insider is all known: iron core adhesive is more simply 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 function is especially aobvious precious to high-power higher-priced A.C. contactor.

Conventional AC contactor is quite different, and it is the function without discriminating to the AC voltage of random connection, entirely with " fortune ".Lucky, AC voltage is at u=Umsin(ω t+ φ) connect adhesive forcefully during=Um; Most time is " unlucky ".If for overcome the minimum exciting voltage of back-moving spring elastic force absolute value (be the absolute value) Wei ∣ u ∣=∣ Umsin(ω t+ φ) ∣=U0 of minimum pick-up voltage:

(1) if connect when the Shun of AC voltage Shi Zhi ∣ u ∣=∣ Umsin(ω t+ φ) ∣=U0, it is with regard to adhesive reluctantly and feebly;

(2) if connect when the Shun of AC voltage Shi Zhi ∣ u ∣=∣ Umsin(ω t+ φ) ∣ < U0, it is with regard to power consumption in vain and can not adhesive, and power consumption always rises to ∣ u ∣=∣ Umsin(ω t+ φ to the instantaneous value of AC voltage) just adhesive reluctantly and feebly during ∣=U0.

One of reason that the contact of Here it is the especially high-power higher-priced conventional AC contactor of conventional AC contactor often burns out, is also that the power consumption of conventional AC contactor is high, one of the reason of temperature rise.

Two, noise

Conventional AC contactor is in the sticking stage, be input to AC voltage in magnet exciting coil " zero passage " (AC voltage by just half circumferentially negative half period or negative half period to " zero crossing " of positive half cycle transition) time, electricity Ya ∣ u ∣=∣ Umsin(ω t+ φ) ∣ < U0 during near Shun zero point, the magnetic force that magnet exciting coil produces is less than the elastic force of back-moving spring, moving iron core will leave static iron core, but when it has just left a very little segment distance, the instantaneous value u of AC voltage has been Shanged and has been Shenged Wei ∣ u ∣=∣ Umsin(ω t+ φ) ∣ > U0, so the moving iron core leaving is retracted by magnetic force again, moving, static iron core is adhesive again.In this process, it is 100Hz(50Hz alternating current that the silicon steel sheet in dynamic and static iron core can produce frequency) or 120Hz(60Hz alternating current) mechanical vibration noise.

Front already described, the present embodiment is when AC voltage " zero passage ", and capacitor C remains certain voltage, and the complementary electric discharge of this voltage and magnet exciting coil L, can guarantee that A.C. contactor keeps stable sticking state.Therefore there is not above-mentioned mechanical vibration noise.The quiet operation without making an uproar of experimental prototype of the present embodiment has proved the correctness of above-mentioned analysis.Noise elimination operation is one of function of the present utility model.

Three, power consumption

1, conventional AC contactor is all connected with AC voltage (or claiming the energising of full-time territory) at sticking state, and the holding power that AC voltage provides is excessive, has caused waste of energy and has caused A.C. contactor unnecessary heating up;

2, in the present embodiment, AC voltage is only in the local time domain of ambipolar transient voltage suppressor diode TVS1 short circuit conducting, for example the time domain (being that the angle of flow is the time domain of Q2) of the time domain of t2～t3 (being that the angle of flow is the time domain of Q1), t4～t6 is to capacitor C and magnet exciting coil L charging energy-storing, therefore, power consumption is much smaller than conventional AC contactor.Saves energy is the most important function of the utility model.

Four, power factor (PF)

The magnet exciting coil of conventional AC contactor is perceptual device, and power factor (PF) must be low.

The present embodiment is at the two ends of magnet exciting coil L and connect capacitor C, and the magnet exciting coil L of perception and the capacitor C of capacitive compensate mutually, and power factor (PF) must improve.

Power factor (PF) is high, is also one of function of the present utility model.

Below, set forth the anti-thunder course of work of the present embodiment:

In conjunction with Fig. 2, Fig. 3, anti lightning road 103 and the AC voltage of the present embodiment are in parallel, the input N1 end of one termination additional electron unit 100, and other end attachment adds the input N2 end of electronic unit 100; It consists of ambipolar transient voltage suppressor diode TVS2, and feature is: before thunder and lightning arrives described N1, N2 end, it is in open-circuit condition; When thunder and lightning arrives the puncture voltage UT2 of N1, N2 end and the ambipolar transient voltage suppressor diode TVS2 of lightning voltage >, its short circuit conducting.

Thunder and lightning arrives N1, N2 end, and when causing ambipolar transient voltage suppressor diode TVS2 short circuit conducting, ambipolar transient voltage suppressor diode TVS1 is inevitable short circuit conducting also.So, the utility model just can be received following anti-thunder effect;

1, due to the short circuit conducting of described TVS1, TVS2, cause: the output voltage U C=0 of additional electron unit 100, A.C. contactor be " reset " just, the electrical equipment that controlled by A.C. contactor is just disconnected AC voltage, these electrical equipment have just been subject to " anti-thunder " of the present utility model protection;

2, due to the short circuit conducting of described TVS2, cause: upper level distribution facility (for example air switch) excess load tripping operation, is subject to the electrical appliance in region that this distribution facility controls also will be subject to " anti-thunder " of the present utility model protection.

" anti-thunder " is one of function of the present utility model.

Figure 13 is that functional-block diagram, Figure 14 of being provided with the embodiment 2 on anti lightning road are the circuit theory diagrams of embodiment 2.

In conjunction with Figure 13: the theory structure of the present embodiment 2 is: a kind of multifunction electric subtype A.C. contactor, comprise additional electron unit 100 and conventional AC contactor two parts that formed by break contact DD, make contact DH, moving iron core M, static iron core G, back-moving spring F, magnet exciting coil L, it is characterized in that: there are N1, N2, P1, tetra-ports of P2 in described additional electron unit 100, is four port networks; Port N1, N2 are two input port, and P1, P2 are two output port; Its structure and connected mode are: described additional electron unit 100 is comprised of N1 end, common port E, P1 end, accumulator 102, P2 end, pressuring controling switch circuit 101, N2 end and anti lightning road 103; Described P1 end, N1 end are all connected with common port E end; One of described accumulator 102 termination P1 end, another termination P2 end; One of described pressuring controling switch circuit 101 termination P2 end, another termination N2 end; One of described anti lightning road 103 termination N1 end, another termination N2 end; Input port N1, N2 are connected with S1, the S2 end of AC voltage respectively, and output port P1, P2 are connected with A1, the A2 end of magnet exciting coil L respectively.

Again in conjunction with Figure 13, Figure 14: described pressuring controling switch circuit 101 by ambipolar transient voltage suppressor diode TVS1 form, accumulator 102 by capacitor C form, anti lightning road 103 is comprised of ambipolar transient voltage suppressor diode TVS2.

The circuit structure of the present embodiment 2 is: described additional electron unit is comprised of N1 end, common port E end, P1 end, capacitor C, P2 end, ambipolar transient voltage suppressor diode TVS1, N2 end and ambipolar transient voltage suppressor diode TVS2; Described N1, P1 end all connects common port E end; One of described capacitor C termination P1 end, another termination P2 end; One of described ambipolar transient voltage suppressor diode TVS1 termination P2 end, another termination N2 end; One of described ambipolar transient voltage suppressor diode TVS2 termination N1 end, another termination N2 end;

Compare with the circuit structure of embodiment 1, although change has been done in the position of ambipolar transient voltage suppressor diode TVS1 in the present embodiment 2, the operation principle of the present embodiment 2, the course of work are still identical with embodiment 1, no longer repeat herein.

It will be apparent to those skilled in the art: in the occasion that does not need " anti-thunder ", anti lightning road 103 can be omitted; Omit the later the utility model in anti lightning road 103, operation principle, the course of work are all identical with embodiment 1.

In other words: the circuit of anti lightning road 103 non-indispensability in the utility model, omit described anti lightning road 103, the utility model still possesses the function of economize on electricity noise elimination and quick pick-up.

Figure 15 is the functional-block diagram of embodiment 3, it has omitted anti lightning road 103, theory structure is: a kind of multifunction electric subtype A.C. contactor, comprise additional electron unit 100 and conventional AC contactor two parts that formed by break contact DD, make contact DH, moving iron core M, static iron core G, back-moving spring F, magnet exciting coil L, it is characterized in that: there are N1, N2, P1, tetra-ports of P2 in described additional electron unit 100, is four port networks; Port N1, N2 are two input port, and P1, P2 are two output port; Its structure and connected mode are: described additional electron unit 100 is comprised of N1 end, common port E end, P1 end, accumulator 102, P2 end, pressuring controling switch circuit 101 and N2 end; Described P1 end, N1 end are all connected with common port E end; One of described accumulator 102 termination P1 end, another termination P2 end; One of described pressuring controling switch circuit 101 termination P2 end, another termination N2 end; Input port N1, N2 are connected with S1, the S2 end of AC voltage respectively, and output port P1, P2 are connected with A1, the A2 end of magnet exciting coil L respectively.

In conjunction with Figure 16, the circuit structure of the present embodiment 3 is: N1 end, common port E end, P1 end, capacitor C, P2 end, ambipolar transient voltage suppressor diode TVS1, N2 end are in series successively and form described additional electron unit 100;

The present embodiment 3 is that embodiment 1 omits the new embodiment redesigning after anti lightning road 103, and its operation principle, the course of work and the various functions except anti-thunder function are all identical with embodiment 1, no longer repeat herein.

Figure 17 is the functional-block diagram of embodiment 4, it has also omitted anti lightning road 103, theory structure is: a kind of multifunction electric subtype A.C. contactor, comprise additional electron unit 100 and conventional AC contactor two parts that formed by break contact DD, make contact DH, moving iron core M, static iron core G, back-moving spring F, magnet exciting coil L, it is characterized in that: there are N1, N2, P1, tetra-ports of P2 in described additional electron unit 100, is four port networks; Port N1, N2 are two input port, and P1, P2 are two output port; Its structure and connected mode are: described additional electron unit 100 is comprised of N1 end, pressuring controling switch circuit 101, P1 end, accumulator 102, P2 end, common port E end and N2 end; One of described pressuring controling switch circuit 101 termination N1 end, another termination P1 end; One of described accumulator 102 termination P1 end, another termination P2 end; Described P2 end, N2 end are all connected with common port E end; Input port N1, N2 are connected with S1, the S2 end of AC voltage respectively, and output port P1, P2 are connected with A1, the A2 end of magnet exciting coil L respectively.

In conjunction with Figure 18, the circuit structure of the present embodiment 4 is: described additional electron unit is in series and forms successively by N1 end, ambipolar transient voltage suppressor diode TVS1, P1 end, capacitor C, P2 end, common port E end, N2 end.

The present embodiment 4 is that embodiment 1 omits another the new embodiment redesigning after anti lightning road 103, and its operation principle, the course of work and the various functions except anti-thunder function are all identical with embodiment 1, no longer repeat herein.

The utility model is illustrated by above-described embodiment, but should be understood that, above-described embodiment is the object for giving an example and illustrating just, but not is intended to the utility model to be limited in described scope of embodiments.In addition it will be understood by those skilled in the art that; the utility model is not limited to above-described embodiment; according to instruction of the present utility model, can also make more kinds of variants and modifications, 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 (1)

1. an additional electron unit for multifunctional ac contactor, described additional electron unit is four port networks, comprises first input end (N1), the second input (N2), the first output (P1) and the second output (P2); Wherein, first input end (N1) connects one end of pressuring controling switch circuit, the other end of pressuring controling switch circuit connects one end of the first output (P1) and accumulator (C), and the other end of accumulator (C), the second input (N2), the second output (P2) connect and compose common port (E) jointly.

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