CN102568932A - Alternating current contactor with power saving and noise elimination - Google Patents
Alternating current contactor with power saving and noise elimination Download PDFInfo
- Publication number
- CN102568932A CN102568932A CN2012100263718A CN201210026371A CN102568932A CN 102568932 A CN102568932 A CN 102568932A CN 2012100263718 A CN2012100263718 A CN 2012100263718A CN 201210026371 A CN201210026371 A CN 201210026371A CN 102568932 A CN102568932 A CN 102568932A
- Authority
- CN
- China
- Prior art keywords
- voltage
- contactor
- circuit
- switch circuit
- accumulator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000008030 elimination Effects 0.000 title claims abstract description 15
- 238000003379 elimination reaction Methods 0.000 title claims abstract description 15
- 230000001052 transient effect Effects 0.000 claims abstract description 39
- 239000003990 capacitor Substances 0.000 claims abstract description 29
- 238000004146 energy storage Methods 0.000 claims abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 39
- 230000000452 restraining effect Effects 0.000 claims description 37
- 230000001070 adhesive effect Effects 0.000 claims description 36
- 239000000853 adhesive Substances 0.000 claims description 34
- 230000005611 electricity Effects 0.000 claims description 17
- 230000003068 static effect Effects 0.000 claims description 17
- 238000007600 charging Methods 0.000 claims description 9
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 230000005284 excitation Effects 0.000 abstract description 3
- 230000005764 inhibitory process Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 20
- 238000010278 pulse charging Methods 0.000 description 19
- 230000008859 change Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000000295 complement effect Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 230000002950 deficient Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 229910000976 Electrical steel Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000001131 transforming effect Effects 0.000 description 2
- 206010016275 Fear Diseases 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001955 cumulated effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Images
Landscapes
- Relay Circuits (AREA)
Abstract
The invention provides an alternating current contactor with power saving and noise elimination which comprises two parts of a power saving unit and an alternating current contactor. The power saving unit is composed of a voltage controlled switch circuit formed by a transient voltage inhibition diode, an energy storage circuit formed by a capacitor, and a rectification and energy locking circuit formed by a diode. The power saving unit is a four-port network, an input port is connected with alternating current voltage, and an output terminal is connected with an excitation coil in the alternating current contactor.
Description
Technical field
The present invention relates to the low-voltage electrical apparatus field, relate in particular to a kind of pulsed A.C. contactor with saves energy, static noise function.
Background technology
A.C. contactor is to use low-voltage electrical apparatus very widely in a kind of electric equipment.Its operation principle is to utilize electromagnet to drive moving contact (make contact) with fixed contact (break contact) closure or separate, and reaches the purpose that switches on or off circuit.It is applicable to starting or control three phase induction motor and other power consumption equipment.
Fig. 1 is the fundamental diagram of traditional A.C. contactor.This traditional A.C. contactor mainly is made up of moving iron core, static iron core, magnet exciting coil, back-moving spring, break contact, make contact.When magnet exciting coil is connected AC220V, AC110V or AC380V power supply (following common name AC220V, AC110V or AC380V power supply are AC power supplies); Moving iron core receives the effect of the magnetic force that magnet exciting coil produces and closed with static iron core; Also closed thereupon with the make contact of moving iron core interlock, external circuit is just connected through this make contact; When the AC voltage on the magnet exciting coil broke off, moving iron core loss of excitation also received the effect of back-moving spring and separates with static iron core, the make contact disconnection that resets, and external circuit just is cut off thereupon.
As stated, the course of work of this traditional A.C. contactor can be divided into " adhesive ", " sticking ", " disconnection " three phases:
1, adhesive: magnet exciting coil and AC voltage are connected, dynamic and static iron core adhesive;
2, sticking: magnet exciting coil continues to connect with AC voltage, and dynamic and static iron core keeps the state of adhesive;
3, break off: magnet exciting coil breaks off AC voltage, and dynamic and static iron core separates, make contact resets disconnection.
Traditional A.C. contactor is owing to all pass to alternating current work in adhesive and the sticking stage magnet exciting coil, the critical defect below therefore existing:
1, heating: in adhesive and sticking stage; Owing to pass to alternating voltage (being AC voltage) in the magnet exciting coil, therefore, will produce stagnant magnetic loss, eddy current loss in the dynamic and static iron core inevitably and generate heat; Magnet exciting coil is brought disaster in the heating of dynamic and static iron core, can cause magnet exciting coil to burn when serious.In addition, also be provided with " short-circuited conducting sleeve " in small-sized traditional A.C. contactor, the existence of this short-circuited conducting sleeve will aggravate the temperature rise of contactor, make magnet exciting coil more be prone to burn.
2, power consumption: the energy of traditional A.C. contactor heating is imported electric energy in the magnet exciting coil exactly, and another shortcoming that the heating that this kind is harmful brings is exactly meaningless power consumption.Reduce this power consumption, just can obtain the effect of " economize on electricity ".
3, noise: be input to the AC voltage in the magnet exciting coil; During " zero passage " at every turn (AC voltage by positive half cycle to negative half period or negative half period " zero crossing ") to positive half cycle transition; Electromagnetic attraction drastic change, can make the silicon steel sheet generation frequency in the dynamic and static iron core is the mechanical vibration noise of 100Hz (50Hz alternating current) or 120Hz (60Hz alternating current).
4, power factor (PF) (Power factor) is low.
To the critical defect that traditional A.C. contactor exists, the technical staff in electronics, the electrical apparatus industry studies, has designed multiple " electricity-saving circuit ", " electricity-saving appliance ", " energy saving ac contactor " that is used to improve traditional A.C. contactor performance.One Chinese patent application number is that 97216246.1 " energy-efficient A.C. contactor ", application number are that 94202133.9 " energy saving ac contactor device ", application number are that 201010144412.4 " a kind of energy saving ac contactor " discloses patent applicant's achievement in research separately.Above-mentioned prior art for improving the performance of conventional AC contactor, has been made useful exploration and has been obtained certain achievement really, but the defective below also existing, that is:
1, complex structure is difficult to carry out; Adopt monolithic processor controlled " A.C. contactor electricity-saving appliance " then to be subject to the electromagnetic interference of electrical equipment such as A.C. contactor itself or motor and cause internal processes execution error, generation " flyer " to miss and control;
2, used electronic device is too many, and electronic circuit is too complicated;
3, the product price of enforcement production is too high, and for example the price of the QXJB type A.C. contactor electricity-saving appliance of Zhuhai City, Guangdong Province Co., Ltd production is up to 1500 yuan/platform! Just more than 20 yuan of the price of small-sized A.C. contactor, the price of medium-sized A.C. contactor also has only hundreds of unit, and so expensive " QXJB type A.C. contactor electricity-saving appliance " will make the user very few.
4, because electronic circuit is complicated, and used electronic device is many, therefore, the economize on electricity of A.C. contactor control partly is difficult to become one with A.C. contactor, and described economize on electricity control partly must be established a box in addition, causes user installation inconvenience, wiring trouble.
5, because electronic circuit is complicated, and used electronic device is many, therefore, the power consumption (AC-DC transition loss, IC power consumption, actuator power consumption etc.) of the economize on electricity of A.C. contactor control part self will increase.That have even greatly to the stage of comparing mutually with the holding power of small-sized contactor.
Have above defective just because of prior art, so the situation below having occurred: " China's electricity-saving type A.C. contactor has had certain market at present, but universal not enough, and traditional A.C. contactor is occupied an leading position on the user uses at present.Main cause is that the power-saving contactor price is more expensive, and the user can't accept on disposable input, awaits country and in the popularization of energy-saving contactor, strengthens the policy dynamics, promotes the extensive use of energy-saving contactor ".
The status of the prior art, the present invention aims to Ti to:
1, simple as far as possible, used device of electronic circuit of design A.C. contactor economize on electricity few, that price is tried one's best honest and clean special-purpose " extra cell " of trying one's best;
2, should " extra cell " can be used for transforming the conventional AC contactor of online use, and make these A.C. contactors become " A.C. contactor of economize on electricity noise elimination ";
3, should " extra cell " also can be integrated in the conventional AC contactor that to produce, the manufacturer of A.C. contactor is produced and " extra cell " incorporate novel " A.C. contactor of economize on electricity noise elimination ".
Thereby there is the demand that overcomes above-mentioned defective and restriction in this area.
Summary of the invention
In order to reach above-mentioned target; The technical scheme of the present invention's design is: a kind of A.C. contactor of the noise elimination that economizes on electricity; Comprise power save unit and A.C. contactor two partly; Said A.C. contactor is made up of moving iron core, static iron core, magnet exciting coil, back-moving spring, break contact, make contact, it is characterized in that:
Described power save unit is made up of pressuring controling switch circuit, accumulator, rectification and energy lock-in circuit, and it is four port networks, and port N1, N2 are its input port, and port P1, P2 are its output port; Input port N1, N2 are connected with two port S1, S2 of AC voltage respectively, output port P1, P2 respectively with A.C. contactor in two port A1, A2 of magnet exciting coil be connected;
Described power save unit is made up of pressuring controling switch circuit, accumulator, rectification and energy lock-in circuit, and the annexation of said pressuring controling switch circuit, accumulator, rectification and energy lock-in circuit is:
(a), N1 end, pressuring controling switch circuit, accumulator, rectification and energy lock-in circuit, the series connection successively of N2 end, the P1 end is drawn from the junction of pressuring controling switch circuit and accumulator, P2 holds and draws from the junction of accumulator and rectification and energy lock-in circuit;
Perhaps be:
(b), N1 end, rectification and energy lock-in circuit, pressuring controling switch circuit, accumulator, the series connection successively of N2 end, the P1 end is drawn from the junction of pressuring controling switch circuit and accumulator, the P2 end is held with N2 and is connected;
Perhaps be:
(c), N1 end, pressuring controling switch circuit, rectification and energy lock-in circuit, accumulator, the series connection successively of N2 end, the P1 end is drawn from the junction of rectification and energy lock-in circuit and accumulator, the P2 end is held with N2 and is connected;
Perhaps be:
(d), N1 end, rectification and energy lock-in circuit, accumulator, pressuring controling switch circuit, the series connection successively of N2 end, the P1 end is drawn from the junction of rectification and energy lock-in circuit and accumulator, P2 holds and draws from the junction of accumulator and pressuring controling switch circuit.
Described pressuring controling switch circuit is made up of ambipolar transient voltage restraining diode TVS (Bipolar transient voltage suppression diode); In the adhesive stage; It is differentiated AC voltage of connecting at random automatically: when the instantaneous value of AC voltage during greater than the value of the puncture voltage UB of described ambipolar transient voltage restraining diode TVS; Its conducting, otherwise then just conducting after the instantaneous value of wouldn't conducting and waiting AC voltage rises; In the sticking stage, its AC voltage and difference of accumulator 102 voltage to input differentiates automatically, and when this difference during greater than UB, its conducting, otherwise it just ends.
Described ambipolar transient voltage restraining diode (TVS) can use piezo-resistance, mono-polar transient voltage restraining diode or voltage stabilizing didoe thrin to substitute.
Described rectification and energy lock-in circuit are made up of diode, and it allows the half cycle of AC voltage to pass through, and when the pressuring controling switch circuit conducting, this diode current flow; When this diode ended, pressuring controling switch circuit ended.
Described accumulator is made up of storage capacitor C, and when the pressuring controling switch circuit conducting, this storage capacitor is by the energy storage of charging with impulse form; When pressuring controling switch circuit ended, this storage capacitor was released ability to described magnet exciting coil L discharge.
Use the present invention, can obtain following beneficial effect:
1, inexpensive.Be used to improve " extra cell " of conventional AC contactor performance among the present invention, three electronic components are only arranged, for electricity-saving type A.C. contactor large tracts of land is promoted the condition of having created;
2, thing is beautiful.In above-mentioned three electronic components; The ambipolar transient voltage restraining diode (or mono-polar transient voltage restraining diode) and the volume of rectifier diode are all very little; Can they be integrated into the inside of conventional AC contactor, manufacture the electricity-saving type A.C. contactor incorporate, that outward appearance is pleasing.
3, reliable.The reliability of electronic product and used number of electric parts are inversely proportional to, and price is directly proportional with used number of electric parts.Used electronic device is many, and electronic circuit is complicated, just means that reliability is low, price is high.The used electronic device of the present invention is few, and therefore, not only at the bottom of the cost, and reliability is high;
4, noise elimination.Conventional AC contactor noise height has been undisputable fact, and personnel have greatly reached nothing to be surprised at, the stage of facing the fearful with no fears to conventional AC contactor noise in the industry.The present invention can accomplish 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 invention are that the former had surpassed 60 ° of C at the temperature on surface after the same place of 25 ° of C was moved 24 hours simultaneously in room temperature; The latter, the temperature on surface still is a room temperature.Temperature rise is the formidable enemy of electronics, electric equipment products, temperature rise, and the useful life of product is just short, on the contrary just can prolong useful life.Therefore, the present invention 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 present invention adopts the pulse current of sudden change.Therefore, conventional AC contactor adhesive action is slow, sound is dull, sucting speed is slow, and adhesive action of the present invention is strong and powerful, clear, more than the twice of sucting speed for the former.The advantage of quick pick-up of the present invention can reduce the electric arc of contact, prevents that contact from burning inefficacy, to the protection contact, prolong the contactor life-span and have important effect.
7, economize on electricity.Temperature rise is low, is the visualize of economize on electricity; Measured result shows that also the electric energy of apparent power of the present invention is greater than 85%.
Description of drawings
Attached drawings this as a part of the present invention 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 functional-block diagram of embodiment 1;
Fig. 3 is the circuit theory diagrams of embodiment 1;
Fig. 4 is the functional-block diagram of embodiment 2;
Fig. 5 is the circuit theory diagrams of embodiment 2;
Fig. 6 is the functional-block diagram of embodiment 3;
Fig. 7 is the circuit theory diagrams of embodiment 3;
Fig. 8 is the functional-block diagram of embodiment 4;
Fig. 9 is the circuit theory diagrams of embodiment 4;
Figure 10 is the circuit theory diagrams of embodiment 5;
Figure 11 is pulse charging current I in the embodiment 1 pulse current charge process
0Timing chart with AC instantaneous voltage u
Figure 12 is the equivalent circuit theory figure of embodiment 1.
Embodiment
In the description hereinafter, a large amount of concrete details have been provided so that more thorough understanding of the invention is provided.Yet, it is obvious to the skilled person that the present invention can need not one or more these details and be able to enforcement.In other example,, describe for technical characterictics more well known in the art for fear of obscuring with the present invention.Below in conjunction with accompanying drawing, execution mode of the present invention is described.
Fig. 2 is the functional-block diagram of embodiment 1, and Fig. 3 is the circuit theory diagrams of embodiment 1; 4, among Fig. 5: dashed rectangle 100 is a power save unit of the present invention, and it is that to have two inputs be N1 and N2 end, two outputs four port networks that to be P1 hold with P2; 101 is pressuring controling switch circuit, and it is made up of ambipolar transient voltage restraining diode TVS; 102 is accumulator, and it is made up of storage capacitor C; 103 are rectification and energy lock-in circuit, and it is made up of diode D; L is the magnet exciting coil of conventional AC contactor; I0 is a pulse charging current.
Described pressuring controling switch circuit 101, accumulator 102, rectification and energy lock-in circuit 103 are formed described power save unit 100:N1 end, pressuring controling switch circuit 101, accumulator 102, rectification and energy lock-in circuit 103, the series connection successively of N2 end as follows; The P1 end is drawn from the pressuring controling switch circuit 101 and the junction of accumulator 102, and the P2 end is drawn from the accumulator 102 and the junction of rectification and energy lock-in circuit 103;
Combine Fig. 2, Fig. 3 again; Formed power save unit 100 after ambipolar transient voltage restraining diode TVS, storage capacitor C, the diode D series connection; And; The left end of ambipolar transient voltage restraining diode TVS connects the input N1 end of power save unit 100, and right-hand member connects the output P1 end of power save unit 100; The upper end of storage capacitor C also connects the output P1 end of power save unit 100, the output P2 end of following termination power save unit 100; The positive pole of diode D also connects the output P2 end of power save unit 100, and negative pole connects the input N2 end of power save unit 100; The input N1 of power save unit 100, N2 end connect S1, the S2 end of AC voltage respectively; The A1 end of magnet exciting coil L in its output P1 end and the A.C. contactor is connected, and P2 holds to hold with the A2 of magnet exciting coil L and is connected.
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. 3, Figure 11, hold the mathematic(al) representation of the AC voltage of input to be from S1, S2:
u=U
msin(ωt＋φ)
In the following formula: u is the instantaneous value of AC voltage, U
mBe the amplitude of AC voltage, ω is the angular frequency of AC voltage, and φ is the initial phase angle of AC voltage.
Be concise explanation, suppose initial phase angle φ=0 at present, then the expression formula of the instantaneous value u of AC voltage is:
u=U
msinωt
Its waveform is shown in figure 11.
During t=0, AC voltage is connected, at this moment, because before AC voltage was connected, storage capacitor C and magnet exciting coil L discharge all finished, so the voltage U at magnet exciting coil L two ends
L=0.
In conjunction with Figure 12, the voltage at ambipolar transient voltage restraining diode TVS two ends is:
U
T=u－U
L
Work as t=t
1The time, U
T=u
1-U
L=u
1-0=u
1=U
mSin ω
T1, if u
1=U
B(U
BPuncture voltage for ambipolar transient voltage restraining diode TVS) then: 0～t
1Time period in, U
T<u
B, ambipolar transient voltage restraining diode TVS ends, and its equivalence is for open circuit, so receive the pulse charging current I of AC driven
0=0, the exciting current I among Figure 12
L=0, among Fig. 1: the moving iron core M in the contactor, not adhesive of static iron core G, promptly contactor is not worked.
T=t
1The time, u
1=U
B, ambipolar transient voltage restraining diode TVS punctures, and is short circuit, u
1Be applied directly between two the output P1 and P2 of extra cell 100, at this moment:
1, rectifier diode D is because of the forward bias conducting;
2, combination Fig. 1: before the iron core adhesive, owing to have one section air gap between moving iron core M and the static iron core G, the magnetic resistance of magnetic circuit is bigger, and therefore, this moment, the inductance value of magnet exciting coil L was very little, was about one of two percentages of iron core adhesive inductance value afterwards, and it is at voltage u
1Effect under, produced bigger exciting current I
L, moving iron core M overcomes resistance and the powerful adhesive of back-moving spring F under the effect of magnetic force;
3, pulse charging current I
0Simultaneously storage capacitor C is charged;
4, combine Figure 12, in the moment that ambipolar transient voltage restraining diode TVS punctures, because the pulse charging current I of storage capacitor C
C1, exciting current I
LAll bigger, therefore, just produced pulse charging current I shown in Figure 11
0The steep rising edge of adhesive pulse 111.
T=t
aThe time, because the adhesive of iron core makes the hurried change of inductance value of magnet exciting coil L big, cause exciting current I
LHurried diminishing, pulse charging current I0 also drops to I thereupon hurriedly
0=I
a
At t
a～t
2Time period in, pulse charging current I
0Receive the influence of following two aspects:
1, the input voltage u that increases progressively in time;
2, along with electric current I
C1C charges constantly to storage capacitor, the voltage U at storage capacitor C two ends
LAlso increase progressively fast in time.
Receive the effect of above two aspects, the I0=Ia of pulse charging current I0 during by t=ta drops to t=t
2The time I
0=I
2,
In the time period of t2～t3, because input voltage u successively decreases in time, therefore, the I of pulse charging current I0 during by t=t2
0=I
2Drop to t=t fast
3The time I
0=I
3
At input voltage u=u
3And U
T=u
3-U
L<u
BCondition when setting up, ambipolar transient voltage restraining diode TVS ends, equivalence causes pulse charging current I for open circuit
0=0 and formed the trailing edge of adhesive pulse 111.
At t
3～t
41Time period in, input voltage u compares u
3Littler, U
T<u
BCondition more be prone to set up, ambipolar transient voltage restraining diode TVS still ends, therefore, pulse charging current I
0Still be I
0=0.
At t
41～t
42Time period in, AC voltage is that S2 end high level, S1 hold low level negative half period, diode D ends, pulse charging current I
0Must be I
0=0.
Analyze so far, can do following brief summary in conjunction with Figure 11:
1, at t=t
1The time, ambipolar transient voltage restraining diode TVS punctures conducting, and iron core begins adhesive, at t=t
aThe time, the iron core adhesive finishes;
2, after the iron core adhesive, AC voltage is through pulse charging current I
0Continuation is to storage capacitor C, magnet exciting coil L charging, until t=t
3The time, ambipolar transient voltage restraining diode TVS turn-offs, and charging finishes.
Ambipolar transient voltage restraining diode TVS turn-offs, pulse charging current I
0=0, after charging finished, A.C. contactor relied on storage capacitor C and the stored electric energy of magnet exciting coil L to keep iron core sticking state, and its process is:
1, combines Figure 11, at t=t
3, ambipolar transient voltage restraining diode TVS shutdown moment because the electric current in the inductance can not suddenly change so exciting current I
LTo continue circulation;
2, storage capacitor C is through magnet exciting coil L discharge, its discharging current I
C2With exciting current I
LDirection-cause, the two keeps complementation each other;
3, as long as select the suitable capacitance of storage capacitor C, its inductance with magnet exciting coil L matches, and just can obtain sufficiently long LC time constant (time constant) T, makes exciting current I
LAt pulse charging current I
0Still have current strength enough, that can keep the iron core sticking in=0 time period.
In conjunction with Figure 11, along with the process of discharge, the voltage U L at storage capacitor C two ends will descend.At t=t
5Constantly, input voltage u=u
5, U
T=u
5-U
L>U
BCondition set up once more, ambipolar transient voltage restraining diode TVS punctures once more and is short circuit, pulse charging current I
0Be storage capacitor C and magnet exciting coil L charging makeup energy once more.At this t=t
5Constantly, because the voltage U at storage capacitor C two ends
LBe consumed and reduce to than low value, therefore, pulse charging current I
0=I
5With bigger value is storage capacitor C and magnet exciting coil L charging makeup energy, thereby forms the precipitous rising edge of " complementary energy pulse 112 ".
1, ambipolar transient voltage restraining diode TVS punctures conducting moment, and storage capacitor C is different with the state of magnet exciting coil L, the former, storage capacitor C and magnet exciting coil L discharge all finish, voltage U
L=0; The latter, storage capacitor C and magnet exciting coil L remain partly energy, U
L≠ 0.Among Figure 12, input voltage u
5With u
1Difference be exactly t=t
5Moment voltage U
LValue, this U
LValue also be that present embodiment can be at t=t
5The reason that still can keep iron core " sticking " state constantly;
2, ambipolar transient voltage restraining diode TVS punctures conducting moment, and the inductance value of magnet exciting coil L is different, the former, iron core is adhesive not, and the inductance value of magnet exciting coil L is little; The latter, iron core is adhesive, and the inductance value of magnet exciting coil L is about the former 200 times.
The above-mentioned course of work of cumulated volume embodiment combines Fig. 2 again, can draw the following characteristic of present embodiment:
1, pressuring controling switch circuit 101 is actually-individual votage control switch with identification function.In the adhesive stage, it is differentiated AC voltage of connecting at random automatically: when the instantaneous value of AC voltage during less than the value of the puncture voltage UB of described ambipolar transient voltage restraining diode TVS, it is by not conducting, as the instantaneous value>=U of AC voltage
BValue the time, its conducting; In the sticking stage, its AC voltage and difference of accumulator 102 voltage to input differentiates, when this difference greater than U
BThe time, its conducting, otherwise, just end.
2, rectification and energy lock-in circuit 103 link with described pressuring controling switch circuit 101 each other, and during pressuring controling switch circuit 101 conductings, it is conducting also; When it ended, pressuring controling switch circuit 101 must end.
3, accumulator 102 both also linked with rectification and energy lock-in circuit 103 with pressuring controling switch circuit 101 each other, during pressuring controling switch circuit 101 conductings, and its energy storage of charging; When pressuring controling switch circuit 101 ended, it is released described magnet exciting coil L discharge could; When ability was released in its discharge, rectification and energy lock-in circuit 103 ended; Rectification that ends and energy lock-in circuit 103 have played the effect of energy on the locking accumulator 102.
Because three circuit; Ambipolar in other words transient voltage restraining diode, TVS storage capacitor C, three elements of diode D dexterously, harmoniously work make present embodiment possess the four big functions of " economize on electricity ", " noise elimination " " powerful adhesive ", " stablizing sticking ".
The check analysis of present embodiment 1 and conventional AC contactor:
One, adhesive
1, present embodiment has selected to have the ambipolar transient voltage restraining diode TVS of suitable puncture voltage UB, makes t=t
1Constantly, promptly ambipolar transient voltage restraining diode TVS puncture, input voltage u
1The magnetic force enough high, that magnet exciting coil L produces enough by force, when being enough to forcefully apace pull-core, the present embodiment adhesive of just switching on, otherwise wait for regard to refusal work rises to u > up to the value of input voltage; U
BThe time pull-core fiercely.
Before state, this characteristic of present embodiment is epochmaking.The insider is all known: the iron core adhesive is more simply quick more, and contact draws the time of arc discharge possibility just shorter, that contact is burnt just more little, and the useful life of A.C. contactor is just permanent more.This characteristic shows precious especially to high-power, higher-priced A.C. contactor.
Say strictly that 2, the pick-up voltage of present embodiment and conventional AC contactor all is at random, it is different and different to connect interchange instantaneous value constantly with AC voltage.Before state, the advantage of present embodiment is: the AC voltage to connecting at random has the function of automatic discriminating: as the instantaneous value u=U of AC voltage
mSin (ω t+ φ)<u
BThe time, the voltage U of its output
L=0; Instantaneous value u=U when AC voltage
mSin (ω t+ φ)>=U
BThe time, the voltage U of its output
L=u, in other words, no matter when AC voltage is connected, the pick-up voltage of present embodiment all>=U
B
The conventional AC contactor is quite different, and its AC voltage to connection does not at random have the function of discriminating, entirely with " fortune ".Lucky, AC voltage is at u=U
mSin (ω t+ φ)=U
mIn time, connect, then adhesive forcefully; Most time then is " unlucky ".If being used to overcome the minimum exciting voltage (being minimum pick-up voltage) of back-moving spring elastic force is u=U
mSin (ω t+ φ)=u
0Then:
(1), if AC voltage at u=u
0In time, connect, and it is with regard to adhesive reluctantly and feebly;
(2), if AC voltage at u<u
0In time, connect, and it is with regard to power consumption in vain and can not adhesive, and the instantaneous value of power consumption always to AC voltage rises to u=u
0The time just adhesive reluctantly and feebly.
That the contact of Here it is the especially high-power higher-priced conventional AC contactor of conventional AC contactor often burns out is therefore former-, also be that the power consumption of conventional AC contactor is high, one of reason of temperature rise.
Two, noise
1, the conventional AC contactor is in the sticking stage, is input to AC voltage in the magnet exciting coil when " zero passage " (AC voltage by positive half cycle to negative half period or negative half period " zero crossing " to positive half cycle transition), near the instantaneous voltage u zero point<u
0(the preceding u that stated
0For being used to overcome the minimum excitation voltage of back-moving spring elastic force); And the electric energy that magnet exciting coil stores exhausts, during the exciting current commutation; Magnetic force is less than the elastic force of back-moving spring; Moving iron core will leave static iron core, but that it has just left is very little-and during segment distance Δ L, the instantaneous value u of AC voltage has risen to u>u
0So, the moving iron core that leaves again by magnetic force retract, the adhesive again of dynamic and static iron core.In this process, the silicon steel sheet in the dynamic and static iron core can produce the mechanical vibration noise that frequency is 100Hz (50Hz alternating current) or 120Hz (60Hz alternating current).
Present embodiment is a DC operation, does not have above-mentioned noise, and the parameter of element selects to guarantee that again it has sufficiently long LC time constant T and can guarantee its stably " sticking " that therefore, present embodiment has the premium properties of " noise elimination ".
Three, power consumption
1, the conventional AC contactor is alternate current operation, has stagnate magnetic loss, eddy current loss; Present embodiment is a DC operation, does not have the magnetic loss of stagnating, eddy current loss.
2, all to switch in the full-time territory of AC voltage be AC all-wave voltage energising to the conventional AC contactor; Present embodiment then does
(1), precedingly state, rectifier diode D is a half-wave voltage with the AC voltage commutation of all-wave.In the present embodiment, at the negative half period of AC voltage all by no power (only this measure, present embodiment are beyond all doubtly than conventional AC contactor power saving 50 ℅);
(2), combine Figure 11: at the positive half cycle of AC voltage, " the adhesive pulse 111 " of present embodiment and the angle of flow Q1 of " complementary energy pulse 112 ", Q2 make present embodiment more advance-go on foot the ground power saving all less than 180 °;
3, the magnet exciting coil of conventional AC contactor is a perceptual device, and power factor (PF) is low, and additional line loss is arranged.The time domain of present embodiment outside the angle of flow; Ambipolar transient voltage restraining diode TVS all ends; During storage capacitor C and magnet exciting coil L charging the energy of gained entirely by " lock " in inside; And noenergy exchange between AC voltage, power factor (PF) → 1 does not exist because of the low and additional line loss of power factor (PF).
Fig. 4 is the functional-block diagram of embodiment 2, and Fig. 5 is the circuit theory diagrams of embodiment 2.In present embodiment 2; Described pressuring controling switch circuit 101, accumulator 102, rectification and energy lock-in circuit 103 are formed described power save unit 100:N1 end, rectification and energy lock-in circuit 103, pressuring controling switch circuit 101, accumulator 102, the series connection successively of N2 end as follows; The P1 end is drawn from the pressuring controling switch circuit 101 and the junction of accumulator 102, and the P2 end is connected with the N2 end.
The operation principle of present embodiment 2, the course of work are identical with embodiment 1, and different has:
1, diode D moves to the input S1 end of AC voltage, and its negative pole is connected with N1 end and S1 end.After having done this change, the positive half cycle that present embodiment 2 becomes AC voltage ends, the pattern of the controlled work of negative half period;
2, S2 end, N2 end link together with the P2 end, do this change, can make things convenient for integrated encapsulation of the present invention.
Fig. 6 is the functional-block diagram of embodiment 3, and Fig. 7 is the circuit theory diagrams of embodiment 3.In present embodiment 3; Described pressuring controling switch circuit 101, accumulator 102, rectification and energy lock-in circuit 103 are formed described power save unit 100:N1 end, pressuring controling switch circuit 101, rectification and energy lock-in circuit 103, accumulator 102, the series connection successively of N2 end as follows; The P1 end is drawn with the junction of accumulator 102 from rectification and energy lock-in circuit 103, and the P2 end is connected with the N2 end.
The operation principle of present embodiment 3, the course of work are identical with embodiment 1, and different has:
1, replaces ambipolar transient voltage restraining diode TVS with mono-polar transient voltage restraining diode TVS1;
2, diode D moves to the output P1 end of power save unit 100; And its negative pole is connected with the P1 end; Because mono-polar transient voltage restraining diode TVS1, diode D, storage capacitor C connect; Again because the present invention uses TVS1 and D as switching device; So after doing this change, the operation principle of present embodiment 3, the course of work are still identical with embodiment 1;
3, with embodiment 2-appearance, S2 end, N2 end link together with the P2 end, make power save unit 100 become three-port network by four port networks, and AC voltage, power save unit 100, magnet exciting coil L have had common point, for practical applications is brought very big facility.
Fig. 8 is the functional-block diagram of embodiment 4, and Fig. 9 is the circuit theory diagrams of embodiment 4.In present embodiment 4; Described pressuring controling switch circuit 101, accumulator 102, rectification and energy lock-in circuit 103 are formed described power save unit 100:N1 end, rectification and energy lock-in circuit 103, accumulator 102, pressuring controling switch circuit 101, the series connection successively of N2 end as follows; The P1 end is drawn with the junction of accumulator 102 from rectification and energy lock-in circuit 103, and the P2 end is drawn from the accumulator 102 and the junction of pressuring controling switch circuit 101.
The operation principle of present embodiment 4, the course of work are identical with embodiment 1, and different has:
1, replace ambipolar transient voltage restraining diode TVS with voltage stabilizing didoe DW, and variation has been done in its position in circuit;
2, variation has been done in the position of diode D in circuit.
Those skilled in the art is clear, do this change after, present embodiment 4 operation principles, the course of work are still identical with embodiment 1.
Figure 10 is the circuit theory diagrams of embodiment 5, and the operation principle of present embodiment 5, the course of work are identical with embodiment 1.Different has: replaced ambipolar transient voltage restraining diode TVS with piezo-resistance VDR1.According to the characteristic of piezo-resistance, do this change after, present embodiment 5 operation principles, the course of work are still identical with embodiment 1.
The present invention is illustrated through the foregoing description, but should be understood that, the foregoing description just is used for for example and illustrative purposes, but not is intended to the present invention is limited in the described scope of embodiments.It will be appreciated by persons skilled in the art that in addition the present invention is not limited to the foregoing description, can also make more kinds of variants and modifications according to instruction of the present invention, these variants and modifications all drop in the present invention's scope required for protection.Protection scope of the present invention is defined by appended claims book and equivalent scope thereof.
Claims (5)
1. the A.C. contactor of the noise elimination that economizes on electricity comprises power save unit and A.C. contactor two partly, and said A.C. contactor is made up of moving iron core, static iron core, magnet exciting coil, back-moving spring, break contact, make contact, it is characterized in that:
Described power save unit is made up of pressuring controling switch circuit, accumulator, rectification and energy lock-in circuit, and it is four port networks, and port N1, N2 are its input port, and port P1, P2 are its output port; Input port N1, N2 are connected with two port S1, S2 of AC voltage respectively, output port P1, P2 respectively with A.C. contactor in two port A1, A2 of magnet exciting coil be connected;
Described power save unit is made up of pressuring controling switch circuit, accumulator, rectification and energy lock-in circuit; The annexation of said pressuring controling switch circuit, accumulator, rectification and energy lock-in circuit is: N1 end, pressuring controling switch circuit, rectification and energy lock-in circuit, accumulator, the series connection successively of N2 end; The P1 end is drawn from the junction of rectification and energy lock-in circuit and accumulator, and the P2 end is connected with the N2 end.
2. the A.C. contactor of economize on electricity noise elimination as claimed in claim 1 is characterized in that: described pressuring controling switch circuit is made up of ambipolar transient voltage restraining diode; In the adhesive stage, it is differentiated AC voltage of connecting at random automatically: as the instantaneous value of the AC voltage puncture voltage (U greater than described ambipolar transient voltage restraining diode
B) value the time, its conducting, otherwise then just conducting after the instantaneous value of wouldn't conducting and waiting AC voltage rises; In the sticking stage, its AC voltage and difference of accumulator voltage to input differentiates automatically, when this difference greater than described (U
B) time, its conducting, otherwise it just ends.
3. the A.C. contactor of economize on electricity noise elimination as claimed in claim 2 is characterized in that: described ambipolar transient voltage restraining diode can use piezo-resistance, mono-polar transient voltage restraining diode or voltage stabilizing didoe thrin to substitute.
4. the A.C. contactor of economize on electricity noise elimination as claimed in claim 1 is characterized in that: described rectification and energy lock-in circuit are made up of diode, and it allows the half cycle of AC voltage to pass through, and when the pressuring controling switch circuit conducting, this diode current flow; When this diode ended, pressuring controling switch circuit ended.
5. the A.C. contactor of economize on electricity noise elimination as claimed in claim 1 is characterized in that: described accumulator is made up of storage capacitor, and when the pressuring controling switch circuit conducting, this storage capacitor is by the energy storage of charging with impulse form; When pressuring controling switch circuit ended, this storage capacitor was released ability to described magnet exciting coil L discharge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210026371.8A CN102568932B (en) | 2012-02-08 | 2012-02-08 | Alternating current contactor with power saving and noise elimination |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210026371.8A CN102568932B (en) | 2012-02-08 | 2012-02-08 | Alternating current contactor with power saving and noise elimination |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102568932A true CN102568932A (en) | 2012-07-11 |
| CN102568932B CN102568932B (en) | 2014-07-16 |
Family
ID=46414085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210026371.8A Expired - Fee Related CN102568932B (en) | 2012-02-08 | 2012-02-08 | Alternating current contactor with power saving and noise elimination |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102568932B (en) |
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 |
| CN103413726A (en) * | 2013-08-01 | 2013-11-27 | 宁波市镇海华泰电器厂 | Power-saving alternating current contactor with threshold voltage |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2037499U (en) * | 1988-08-22 | 1989-05-10 | 梁正 | Contact maker by permanent magnet keep closing |
| CN2469545Y (en) * | 2001-04-25 | 2002-01-02 | 高宪彪 | Energy conservation and noise elimination AC contactor with cast-iron core |
| CN200950423Y (en) * | 2006-09-29 | 2007-09-19 | 德力西集团有限公司 | AC contactor control circuit and energy-saving material-saving AC contactor having the same |
-
2012
- 2012-02-08 CN CN201210026371.8A patent/CN102568932B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2037499U (en) * | 1988-08-22 | 1989-05-10 | 梁正 | Contact maker by permanent magnet keep closing |
| CN2469545Y (en) * | 2001-04-25 | 2002-01-02 | 高宪彪 | Energy conservation and noise elimination AC contactor with cast-iron core |
| CN200950423Y (en) * | 2006-09-29 | 2007-09-19 | 德力西集团有限公司 | AC contactor control circuit and energy-saving material-saving AC contactor having the same |
Cited By (4)
| 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 |
| CN103413726A (en) * | 2013-08-01 | 2013-11-27 | 宁波市镇海华泰电器厂 | Power-saving alternating current contactor with threshold voltage |
| CN103413726B (en) * | 2013-08-01 | 2015-10-28 | 宁波市镇海华泰电器厂 | Be provided with the power-saving alternating-current contactor of threshold voltage |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102568932B (en) | 2014-07-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102543579B (en) | Power-saving and silencing alternating-current contactor | |
| CN202521032U (en) | Muting electromagnetic valve | |
| CN103400724B (en) | Power saving and silencing AC contactor with thunder-proof function | |
| CN202423130U (en) | Alternating current contactor capable of saving electricity and silencing | |
| CN102568932B (en) | Alternating current contactor with power saving and noise elimination | |
| CN202565196U (en) | Pulse type solenoid valve excitation power supply | |
| CN202580234U (en) | Magnetic valve with energy storage circuit unit | |
| CN202501080U (en) | Electronic type alternating current electromagnetic valve | |
| CN202423132U (en) | Alternating-current contactor capable of saving power and silencing | |
| CN102637554B (en) | Frequency conversion unit used for alternating current contactor | |
| CN202501081U (en) | Silent electromagnetic valve with electricity saving function | |
| CN202564136U (en) | Power-saving and silent alternating-current contactor | |
| CN202678219U (en) | Alternating current contactor capable of saving electricity and silencing | |
| CN203774191U (en) | Power-saving type AC contactor with threshold voltage control | |
| CN202473755U (en) | Power-saving silencing alternating current (AC) contactor | |
| CN203774193U (en) | Power-saving type AC contactor applying auxiliary contact | |
| CN202443917U (en) | Energy-saving and silencing AC (alternating current) contactor | |
| CN202423131U (en) | Electricity-saving and squelching alternating current contactor | |
| CN103474293A (en) | Electronic type power-saving alternating current contactor | |
| CN102592886B (en) | Electricity saving and silencing alternating current contactor | |
| CN102543580B (en) | Power-saving and silencing alternating-current contactor | |
| CN202523640U (en) | Variable frequency power-saving AC (Alternate Current) contactor | |
| CN203386661U (en) | Power saving AC contactor provided with threshold voltage | |
| CN203386660U (en) | Power saving AC contactor provided with power-saving unit | |
| CN103413725B (en) | Be provided with the electricity-saving type A.C. contactor of power save unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160401 Address after: 511493, Guangdong, Panyu District province Guangzhou east ring street, 537 North Avenue, Panyu, Panyu energy saving technology park, Hill Pioneering Center, building 2, zone 505, 1 (only office use) Patentee after: Guangzhou Xingzhong Energy Technology Co.,Ltd. Address before: 315200 Zhejiang province Zhenhai District of Ningbo City Jiao Chuan Ying Shi Qiao Zhu No. 74 Patentee before: NINGBO ZHENHAI HUATAI ELECTRIC APPLIANCE FACTORY |
|
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 510000 No. 16, Haishun Road, Nancun Town, Panyu District, Guangzhou City, Guangdong Province, 2111 Patentee after: Guangdong Xingzhong Energy Saving Technology Co.,Ltd. Address before: 511493 East Ring Street, Panyu District, Guangzhou City, Guangdong Province, 537 North Panyu Avenue, Panyu Energy-saving Science and Technology Park, Panyu City, Panyu City, Guangdong Province, No. 1 Building, No. 2 District 505 (Office only) Patentee before: Guangzhou Xingzhong Energy Technology Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140716 |