CN103871783A - Power-saving circuit of alternating current contactor - Google Patents
Power-saving circuit of alternating current contactor Download PDFInfo
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- CN103871783A CN103871783A CN201410125394.3A CN201410125394A CN103871783A CN 103871783 A CN103871783 A CN 103871783A CN 201410125394 A CN201410125394 A CN 201410125394A CN 103871783 A CN103871783 A CN 103871783A
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Abstract
The invention discloses a power-saving circuit of an alternating current contactor. The power-saving circuit is a four-port network with a port N1, a port N2, a port P1 and a port P2, the port N1 and the port N2 are two input ports of the power-saving circuit, and the port P1 and the port P2 are two output ports of the power-saving circuit. The input port N1 is connected with the end S1 of AC voltages and the end 11 of a normally closed auxiliary contact K. The output port P1 is connected with the end 12 of the normally closed auxiliary contact K and the end A1 of an excitation coil L of the alternating current contactor. The input port N2 is connected with the end S2 of the AC voltages, and the output port P2 is connected with the end A2 of the excitation coil L.
Description
Technical field
The present invention relates to Low Voltage Electrical Apparatus, relate in particular to a kind of " power save circuit of A.C. contactor " that makes conventional AC contactor saves energy.
Background technology
A.C. contactor (Alternating Current Contactor) is a kind of application low-voltage electrical apparatus very widely, ends 2012, nearly 1,000,000,000 of the A.C. contactors of China's on-line operation, and to increase every year the speed increase of 8,000 ten thousand newly.Its operation principle is to utilize electromagnet drive moving contact (make contact) with fixed contact (break contact) closure or separate, and reaches the object that switches on or off circuit, 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 made up of moving iron core, static iron core, magnet exciting coil, back-moving spring, break contact, make contact.In the time that 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 be subject to magnet exciting coil produce magnetic force effect and with static iron core closure, also thereupon closed with the make contact of moving iron core interlock, external circuit is just connected by this make contact; In the time that AC voltage on magnet exciting coil disconnects, moving iron core loss of excitation is also subject to the effect of back-moving spring and separates with static iron core, and make contact resets and disconnects, and external circuit is just cut off thereupon.In A.C. contactor, this " with the contact of moving iron core interlock " has four groups, and wherein three groups are used for switching on or off the main contacts of " three-phase electricity ", " auxiliary contact " that another group is " dynamic circuit breaker " or " dynamic circuit connector "---for the control of system.
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, and " adhesive power " is larger, 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 just 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 " separates.
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, cause meaningless electric energy loss;
2, heating: the disastrous effect that meaningless electric energy loss produces is " heating heats up ", when serious, even can burn the magnet exciting coil of traditional A.C. contactor;
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 nearly hundred yuan, and so expensive " QXJB type economizer of AC. contactor " will make user very few.
4, due to electronic circuit complexity, electronic device used is many, and therefore, the economize on electricity control part of A.C. contactor is difficult to become one with A.C. contactor, and described economize on electricity control part must separately be established a box, causes user installation inconvenience, wiring trouble.
5, due to electronic circuit complexity, electronic device used is many, therefore, the power consumption (AC-DC transition loss, IC power consumption, actuator power consumption etc.) of the economize on electricity control part of A.C. contactor self will increase, and what have is even large to the stage comparable with the holding power of small-size contactor.
There is above defect just because of prior art, 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, and user can't accept in disposable input, awaits country and in the popularization of energy-saving type contactor, strengthens policy dynamics, promotes 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)
For the present situation of prior art, the present invention want Da to target be: grasping " to essence must to letter; have simple and practical ability only and spread for a long time " aim, " 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 exceed " being provided with the A.C. contactor of power save circuit " of " to the essence to letter " of prior art.
Summary of the invention
A power save circuit for A.C. contactor, described power save circuit is four port networks that are provided with N1, N2, P1, tetra-ports of P2, and port N1, N2 are two input port, and P1, P2 are two output port; Described input port N1 was both connected and was also connected with 11 ends of conventional AC contactor it " dynamic circuit breaker auxiliary contact K " with the S1 end of AC voltage; Described output port P1 had both been connected with 12 ends of described " dynamic circuit breaker auxiliary contact K " and had also been connected with the A1 end of conventional AC contactor it " magnet exciting coil L "; Described input port N2 and the S2 of AC voltage end is connected, and described output port P2 holds and is connected with the A2 of described " magnet exciting coil L ".
S1 end, the S2 end of described AC voltage can connect in reciprocity.
11 ends, 12 ends of described " dynamic circuit breaker auxiliary contact K " can connect in reciprocity.
A1 end, the A2 end of described " magnet exciting coil L " also can connect in reciprocity.
The circuit structure of the power save circuit of four described ports and be with the connected mode of described dynamic circuit breaker auxiliary contact K:
(a), described dynamic circuit breaker auxiliary contact K, ambipolar transient voltage suppressor diode TVS, the first capacitor C 1 be in parallel after one end is connected with described N1 end, the other end is held and is connected with described P1; One end of the second capacitor C 2 is connected with described P1 end, and the other end is connected with described P2 end; Described P2 end is connected with described N2 end.
Or be that 11 ends of (b), described dynamic circuit breaker auxiliary contact K, the positive pole of the first monopole type transient voltage suppressor diode TVS1, one end of the first capacitor C 1 are all connected with described N1 end; The other end of 12 ends of described dynamic circuit breaker auxiliary contact K, the positive pole of the second monopole type transient voltage suppressor diode TVS2, the first capacitor C 1 is all connected with described P1 end; The negative pole of the first monopole type transient voltage suppressor diode TVS1 is connected with the negative pole of the second monopole type transient voltage suppressor diode TVS2; One end of the second capacitor C 2 is connected with described P1 end, and the other end is connected with described P2 end; Described P2 end is connected with described N2 end.
Or be that 11 ends of (c), described dynamic circuit breaker auxiliary contact K, the negative pole of the 3rd monopole type transient voltage suppressor diode TVS3, one end of the first capacitor C 1 are all connected with described N1 end; The other end of 12 ends of described dynamic circuit breaker auxiliary contact K, the negative pole of the 4th monopole type transient voltage suppressor diode TVS4, the first capacitor C 1 is all connected with described P1 end; The positive pole of the 3rd monopole type transient voltage suppressor diode TVS3 is connected with the positive pole of the 4th monopole type transient voltage suppressor diode TVS4; One end of the second capacitor C 2 is connected with described P1 end, and the other end is connected with described P2 end; Described P2 end is connected with described N2 end.
Or be that after (d), described dynamic circuit breaker auxiliary contact K, gas discharge tube (gaseous discharge tube) GDT, the first capacitor C 1 are in parallel, one end is connected with described N1 end, the other end is connected with described P1 end; One end of the second capacitor C 2 is connected with described P1 end, and the other end is connected with described P2 end; Described P2 end is connected with described N2 end.
Or be that after (e), described dynamic circuit breaker auxiliary contact K, semiconductor discharge tube (thyristor surge suppressors) TSS, the first capacitor C 1 are in parallel, one end is connected with described N1 end, the other end is connected with described P1 end; One end of the second capacitor C 2 is connected with described P1 end, and the other end is connected with described P2 end; Described P2 end is connected with described N2 end.
Or be that after (f), described dynamic circuit breaker auxiliary contact K, static supression device (Electro-Static discharge) ESD, the first capacitor C 1 are in parallel, one end is connected with described N1 end, the other end is connected with described P1 end; One end of the second capacitor C 2 is connected with described P1 end, and the other end is connected with described P2 end; Described P2 end is connected with described N2 end.
Or be that after (g), described dynamic circuit breaker auxiliary contact K, varistor VDR, the first capacitor C 1 are in parallel, one end is connected with described N1 end, the other end is connected with described P1 end; One end of the second capacitor C 2 is connected with described P1 end, and the other end is connected with described P2 end; Described P2 end is connected with described N2 end.
Or be that 11 ends of (h), described dynamic circuit breaker auxiliary contact K, the negative pole of the first voltage stabilizing didoe DW1, one end of the first capacitor C 1 are all connected with described N1 end; The other end of 12 ends of described dynamic circuit breaker auxiliary contact K, the negative pole of the second voltage stabilizing didoe DW2, the first capacitor C 1 is all connected with described P1 end; The positive pole of the first voltage stabilizing didoe DW1 is connected with the positive pole of the second voltage stabilizing didoe DW2; One end of the second capacitor C 2 is connected with described P1 end, and the other end is connected with described P2 end; Described P2 end is connected with described N2 end.
Or be (i), 11 ends of described dynamic circuit breaker auxiliary contact K, the positive pole of the 3rd voltage stabilizing didoe DW3, one end of the first capacitor C 1 are all connected with described N1 end; The other end of 12 ends of described dynamic circuit breaker auxiliary contact K, the positive pole of the 4th voltage stabilizing didoe DW4, the first capacitor C 1 is all connected with described P1 end; The negative pole of the 3rd voltage stabilizing didoe DW3 is connected with the negative pole of the 4th voltage stabilizing didoe DW4; One end of the second capacitor C 2 is connected with described P1 end, and the other end is connected with described P2 end; Described P2 end is connected with described N2 end.
Application the present invention, can obtain following beneficial effect:
1, inexpensive: the extremely essence for improvement of conventional AC contactor performance in the present invention, to " power save circuit " of letter, only has three electronic devices (or four electronic devices), and total cost is less than 0.5 yuan.Only spend several maos, just can make conventional AC contactor be promoted to " the electricity-saving type A.C. contactor " of premium properties, solve 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 U.S.: the volume of above-mentioned three electronic devices (or four electronic devices) is all fine, can be integrated into them 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 present invention only uses three electronic devices (or four 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, the sphere of action of AC voltage is wide, the present invention who is AC220V to field power supply, and AC voltage drop is during to 176V, still reliably adhesive and sticking;
5, economize on electricity: measured result also shows, the present invention has higher electric energy.
In order to survey electric energy of the present invention, just make model machine (only need several electronic devices, model machine is easy to do), measure respectively the index of following two kinds of A.C. contactors with " EPM8200 multifunctional electrical parameter measuring instrument ":
(1), do not add the present invention's's it " power save circuit " CJX2-1201 type conventional AC contactor (hereinafter to be referred as traditional part);
(2), by method of the present invention, described CJX2-1201 type conventional AC contactor adds novel " being provided with the A.C. contactor of power save circuit " (hereinafter to be referred as invention part) that transformation forms after " power save circuit ".
Result is as follows:
Above measured result shows: " active power power saving rate " of the present invention reaches 65%, and " apparent power power saving rate " reaches 76%.
Brief description of the drawings
Fig. 1 is the schematic diagram of conventional AC contactor;
Fig. 2 is the circuit theory diagrams of embodiment a;
Fig. 3 is the circuit theory diagrams of embodiment b;
Fig. 4 is the circuit theory diagrams of embodiment c;
Fig. 5 is the circuit theory diagrams of embodiment d:
Fig. 6 is the circuit theory diagrams of embodiment e:
Fig. 7 is the circuit theory diagrams of embodiment f:
Fig. 8 is the circuit theory diagrams of embodiment g:
Fig. 9 is the circuit theory diagrams of embodiment h:
Figure 10 is the circuit theory diagrams of embodiment i:
Figure 11 is the process chart of embodiment a:
Figure 12 is that embodiment a is at t=t
1time equivalent circuit diagram;
Figure 13 is that embodiment a is at t=t
2time equivalent circuit diagram;
Figure 14 is that embodiment a is at t=t
3time equivalent circuit diagram;
Figure 15 is that embodiment a is at t=t
4time equivalent circuit diagram;
Figure 16 is that embodiment a is at t=t
6time equivalent circuit diagram;
Figure 17 is that embodiment a is at t=t
7time equivalent circuit diagram;
Figure 18 is that embodiment a is at t=t
8time equivalent circuit diagram;
Figure 19 is that embodiment a is at t=t
10time equivalent circuit diagram.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the present invention are described.
Fig. 2 is the circuit theory diagrams of the present invention's embodiment a.In Fig. 2: L is the magnet exciting coil in conventional AC contactor, two links that A1, A2 are it; K is conventional AC contactor it " dynamic circuit breaker auxiliary contact ", 11,12 two links that are it; Dashed rectangle 100 represents power save circuit 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; 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;
S1 end, the S2 end of described AC voltage can connect in reciprocity.
11 ends, 12 ends of described " dynamic circuit breaker auxiliary contact K " can connect in reciprocity.
A1 end, the A2 end of described " magnet exciting coil L " also can connect in reciprocity.
The power save circuit 100 of four described ports is made up of ambipolar transient voltage suppressor diode TVS, the first capacitor C 1 and the second capacitor C 2, its circuit structure and be with the connected mode of described dynamic circuit breaker auxiliary contact K: after described dynamic circuit breaker auxiliary contact K, ambipolar transient voltage suppressor diode TVS, the first capacitor C 1 are in parallel, one end is connected with described N1 end, and the other end is held and is connected with described P1; One end of the second capacitor C 2 is connected with described P1 end, and the other end is connected with described P2 end; Described P2 end is connected with described N2 end;
Described power save circuit 100 is combined by described mode with conventional AC contactor, can form novel " being provided with the A.C. contactor of power save circuit ".
In conjunction with Fig. 2, Figure 11: from the mathematic(al) representation of the AC voltage of S1, S2 end input be:
u＝U
mSin（2πft＋φ）
In above formula: u is the instantaneous value of AC voltage, U
mfor the amplitude of AC voltage, 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＝U
mSin2πft
Its waveform as shown in figure 11.In figure: t represents that time, u represent the instantaneous value of AC voltage.
The operation principle of ambipolar transient voltage suppressor diode TVS is: as its both end voltage U
tlower than its puncture voltage V
bRtime, described ambipolar transient voltage suppressor diode TVS is an insulator, presents high impedance, is approximately open circuit, described ambipolar transient voltage suppressor diode TVS is cut-off state; As its both end voltage U
tbe greater than its puncture voltage V
bRtime, just produce snowslide and present Low ESR, be approximately short circuit, described ambipolar transient voltage suppressor diode TVS is conducting state.From above-mentioned operation principle: described ambipolar transient voltage suppressor diode TVS can be puncture voltage V by the voltage clamp at its two ends
bR.
Set forth the course of work of the present embodiment a below in conjunction with accompanying drawing:
In conjunction with Fig. 2, Figure 11: t=t
1time, AC voltage is connected, and now, described dynamic circuit breaker auxiliary contact K is closed short-circuit condition, the voltage U at the first capacitor C 1 two ends
t=0, be approximate short-circuit condition.The AC voltage of input is applied directly to the two ends of described magnet exciting coil L by described dynamic circuit breaker auxiliary contact K.
T=t
1time, the instantaneous value of AC voltage:
u
1＝U
mSin2πft
1＜U
SL
In above formula, U
sLfor " the minimum pick-up voltage " of A.C. contactor.Due to u
1< U
sL, therefore, the described not adhesive of A.C. contactor that is provided with power save circuit, described dynamic circuit breaker auxiliary contact K continues to remain closed the state of short circuit, described u
1by described dynamic circuit breaker auxiliary contact K, to the second capacitor C 2, magnet exciting coil L charging, Figure 12 is its equivalent electric circuit, in figure: i
k1represent t=t
1time flow through the electric current of dynamic circuit breaker auxiliary contact K; i
c21represent t=t
1time charging current in the second capacitor C 2; i
l1represent t=t
1time charging current on magnet exciting coil L.
T=t
2time, the instantaneous value of AC voltage:
u
2＝U
mSin2πft
2＞U
SL
Due to u
2> U
sLtherefore the described A.C. contactor adhesive that is provided with power save circuit, enters sticking state; Described dynamic circuit breaker auxiliary contact K enters the open-circuit condition of disconnection; The first capacitor C 1 starts charging, described u
2provide " sticking " power by the first capacitor C 1 for magnet exciting coil L.Figure 13 is its equivalent electric circuit, in figure: i
c12represent t=t
2time, the charging current in the first capacitor C 1; i
c22represent t=t
2time, the charging current in the second capacitor C 2; i
l2represent t=t
2time exciting current on magnet exciting coil L.
Along with the process of charging, the voltage U at the first capacitor C 1 two ends
tcontinue to rise, to t=t
3time, the instantaneous value of AC voltage is u
3=U
msin2 π ft
3, now, the voltage U at the first capacitor C 1 two ends
tvalue has risen to the puncture voltage V of described ambipolar transient voltage suppressor diode TVS
bRvalue, described ambipolar transient voltage suppressor diode TVS punctures conducting, is conducting state, the voltage U at its two ends
tclamped down on as its puncture voltage V
bR, the first capacitor C 1 stops charging, and AC voltage changes and continues as magnet exciting coil L by the ambipolar transient voltage suppressor diode TVS that is conducting state " sticking " power is provided.Figure 14 is its equivalent electric circuit, in figure: i
tVS3represent t=t
3time, the On current of ambipolar transient voltage suppressor diode TVS; i
c23represent t=t
3time, the charging current in the second capacitor C 2; i
l3represent t=t
3time exciting current on magnet exciting coil L.
T=t
4time, the instantaneous value of AC voltage is u
4=U
msin2 π ft
4, now, the voltage U between output P1 end and the P2 end of power save circuit 100
crise to high value, the voltage U at ambipolar transient voltage suppressor diode TVS two ends
t=u
4-U
c< V
bR, ambipolar transient voltage suppressor diode TVS cut-off is turn-offed.Meanwhile, along with the decline of AC voltage, the voltage U in the first capacitor C 1
tbe greater than u with the voltage U C sum in the second capacitor C 2
4value, that is:
U
C＋U
T＞u
4
Therefore, the second capacitor C 2 not only to magnet exciting coil L electric discharge, but also hold electric discharge by the first capacitor C 1 to S1 end, S2.Figure 15 is its equivalent electric circuit, in figure: i
c2Lrepresent t=t
4time, ambipolar transient voltage suppressor diode TVS cut-off is closed and is had no progeny, and the second capacitor C 2 is to the electric current of magnet exciting coil L electric discharge; i
c24represent t=t
4time, total discharging current of the second capacitor C 2; i
l4represent t=t
4time freewheel current on magnet exciting coil L; i
c14represent t=t
4time, the discharging current of the first capacitor C 1; i
c4represent t=t
4time, the discharging current that the first capacitor C 1, the second capacitor C 2 are held to S1 end, S2.
Again in conjunction with Fig. 2, Figure 11: t=t
6time, AC voltage entered S2 be just, S1 is negative negative half period, t=t
6time, the instantaneous value of AC voltage is u
6=U
msin2 π ft
6, now, the electricity that the first capacitor C 1, the second capacitor C 2 are filled in the time of the positive half cycle of AC voltage all discharges, from t=t
6moment rises, u
6start the first capacitor C 1, the second capacitor C 2 and magnet exciting coil L charging.Figure 16 is its equivalent electric circuit, in figure: i
c26represent t=t
6time, the charging current of the second capacitor C 2; i
l6represent t=t
6time charging current on magnet exciting coil L; i
c16represent t=t
6time, the charging current of the first capacitor C 1.
Along with the process of charging, the voltage U at the first capacitor C 1 two ends
tcontinue to rise, to t=t
7time, the instantaneous value of AC voltage is u
7=U
msin2 π ft
7, now, the voltage U at the first capacitor C 1 two ends
tvalue risen to the puncture voltage V of described ambipolar transient voltage suppressor diode TVS
bRvalue (its polarity and t=t
3time V
bRon the contrary), described ambipolar transient voltage suppressor diode TVS punctures conducting again, is conducting state, the voltage U at its two ends
tagain clamped down on as puncture voltage V
bR, the first capacitor C 1 stops charging, and AC voltage changes and continues as magnet exciting coil L by the ambipolar transient voltage suppressor diode TVS that is conducting state " sticking " power is provided.Figure 17 is its equivalent electric circuit, in figure: i
tVS7represent t=t
7time, the On current of ambipolar transient voltage suppressor diode TVS; i
c27represent t=t
7time, the charging current in the second capacitor C 2; i
l7represent t=t
7time exciting current on magnet exciting coil L.
T=t
8time, the instantaneous value of AC voltage is u
8=U
msin2 π ft
8, now, the voltage U between output P2 end and the P1 end of power save circuit 100
chigh value (polarity and t=t are risen to
4time contrary), the voltage U at ambipolar transient voltage suppressor diode TVS two ends
t=u
8-U
c< V
bR, ambipolar transient voltage suppressor diode TVS cut-off is turn-offed.Meanwhile, the voltage U in the first capacitor C 1
twith the voltage U in the second capacitor C 2
csum has been greater than u
8value, that is:
U
C＋U
T＞u
8
Therefore, the second capacitor C 2, both to magnet exciting coil L electric discharge, is held electric discharge by the first capacitor C 1 to S2 end, S1 again.Figure 18 is its equivalent electric circuit, in figure: i
c2Lrepresent t=t
8time, ambipolar transient voltage suppressor diode TVS cut-off close have no progeny, the second capacitor C 2 is to electric current (polarity and the t=t of magnet exciting coil L electric discharge
4time contrary); i
c28represent t=t
8time, total discharging current of the second capacitor C 2; i
l8represent t=t
8time freewheel current on magnet exciting coil L; i
c18represent t=t
8time, the discharging current of the first capacitor C 1; i
c8represent t=t
8time, the discharging current that the first capacitor C 1, the second capacitor C 2 are held to S2 end, S1.
With t=t
6time corresponding, t=t
10time, AC voltage entered again S1 be just, S2 is the positive half cycle of bearing, t=t
10time, the instantaneous value of AC voltage is u
10=U
msin2 π ft
10, now, the electricity that the first capacitor C 1, the second capacitor C 2 are filled in the time of AC voltage negative half cycle all discharges, from t=t
10moment rises, u
10start the first capacitor C 1, the second capacitor C 2 and magnet exciting coil L charging.Figure 19 is its equivalent electric circuit, in figure: i
c210represent t=t
10time, the charging current of the second capacitor C 2; i
l10represent t=t
10time charging current on magnet exciting coil L; i
c110represent t=t
10time, the charging current of the first capacitor C 1.
So circulation, the present embodiment has just completed described " adhesive " of the A.C. contactor that is provided with power save circuit and the course of work of " sticking ".
Known in sum: described dynamic circuit breaker auxiliary contact K matches with the first described capacitor C 1, make the described A.C. contactor that is provided with power save circuit complete the course of work of " adhesive "; Described ambipolar transient voltage suppressor diode TVS, the first described capacitor C 1, the second described capacitor C 2 are worked in coordination, for the described A.C. contactor that is provided with power save circuit provides " sticking " power.
Fig. 3 is the circuit theory diagrams of embodiment b, and it is made up of power save circuit 100 and conventional AC contactor two parts, described power save circuit 100 is one and is provided with N1, N2, P1, four port networks of tetra-ports of P2, it is identical with embodiment a with the method for attachment of outside each port, it is by the first monopole type transient voltage suppressor diode TVS1, the second monopole type transient voltage suppressor diode TVS2, the first capacitor C 1 and the second capacitor C 2 form, circuit structure and be with the connected mode of dynamic circuit breaker auxiliary contact K in conventional AC contactor: 11 ends of described dynamic circuit breaker auxiliary contact K, the positive pole of the first monopole type transient voltage suppressor diode TVS1, one end of the first capacitor C 1 is all connected with described N1 end, the other end of 12 ends of described dynamic circuit breaker auxiliary contact K, the positive pole of the second monopole type transient voltage suppressor diode TVS2, the first capacitor C 1 is all connected with described P1 end, the negative pole of the first monopole type transient voltage suppressor diode TVS1 is connected with the negative pole of the second monopole type transient voltage suppressor diode TVS2, one end of the second capacitor C 2 is connected with described P1 end, and the other end is connected with described P2 end, described P2 end is connected with described N2 end.
The circuit structure of the present embodiment and embodiment a are basic identical, and difference is: the present embodiment has substituted the ambipolar transient voltage suppressor diode TVS in embodiment a with the first monopole type transient voltage suppressor diode TVS1 and the second monopole type transient voltage suppressor diode TVS2.
The course of work of the present embodiment is identical with embodiment a.
Fig. 4 is the circuit theory diagrams of embodiment c, and it is made up of power save circuit 100 and conventional AC contactor two parts, described power save circuit 100 is one and is provided with N1, N2, P1, four port networks of tetra-ports of P2, it is identical with embodiment a with the method for attachment of outside each port, it is by the 3rd monopole type transient voltage suppressor diode TVS3, the 4th monopole type transient voltage suppressor diode TVS4, the first capacitor C 1 and the second capacitor C 2 form, circuit structure and be with the connected mode of dynamic circuit breaker auxiliary contact K in conventional AC contactor: 11 ends of described dynamic circuit breaker auxiliary contact K, the negative pole of the 3rd monopole type transient voltage suppressor diode TVS3, one end of the first capacitor C 1 is all connected with described N1 end, the other end of 12 ends of described dynamic circuit breaker auxiliary contact K, the negative pole of the 4th monopole type transient voltage suppressor diode TVS4, the first capacitor C 1 is all connected with described P1 end, the positive pole of the 3rd monopole type transient voltage suppressor diode TVS3 is connected with the positive pole of the 4th monopole type transient voltage suppressor diode TVS4, one end of the second capacitor C 2 is connected with described P1 end, and the other end is connected with described P2 end, described P2 end is connected with described N2 end.
The circuit structure of the present embodiment and embodiment a are basic identical, and difference is: the present embodiment has substituted the ambipolar transient voltage suppressor diode TVS in embodiment a with the 3rd monopole type transient voltage suppressor diode TVS3 and the 4th monopole type transient voltage suppressor diode TVS4.
The course of work of the present embodiment is identical with embodiment a.
Fig. 5 is the circuit theory diagrams of embodiment d, and it is made up of power save circuit 100 and conventional AC contactor two parts; Described power save circuit 100 is four port networks that are provided with N1, N2, P1, tetra-ports of P2, it is identical with embodiment a with the method for attachment of outside each port, it is made up of gas discharge tube GDT, the first capacitor C 1 and the second capacitor C 2, circuit structure and be with the connected mode of the dynamic circuit breaker auxiliary contact K in conventional AC contactor: after described dynamic circuit breaker auxiliary contact K, gas discharge tube GDT, the first capacitor C 1 is in parallel, one end is connected with described N1 end, and the other end is held and is connected with described P1; One end of the second capacitor C 2 is connected with described P1 end, and the other end is connected with described P2 end; Described P2 end is connected with described N2 end.
The circuit structure of the present embodiment and embodiment a are basic identical, and difference is: the present embodiment has substituted the ambipolar transient voltage suppressor diode TVS in embodiment a with gas discharge tube GDT.
The course of work of the present embodiment is identical with embodiment a.
Fig. 6 is the circuit theory diagrams of embodiment e, and it is made up of power save circuit 100 and conventional AC contactor two parts; Described power save circuit 100 is four port networks that are provided with N1, N2, P1, tetra-ports of P2, it is identical with embodiment a with the method for attachment of outside each port, it is made up of semiconductor discharge tube TSS, the first capacitor C 1 and the second capacitor C 2, circuit structure and be with the connected mode of the dynamic circuit breaker auxiliary contact K in conventional AC contactor: after described dynamic circuit breaker auxiliary contact K, semiconductor discharge tube TSS, the first capacitor C 1 is in parallel, one end is connected with described N1 end, and the other end is held and is connected with described P1; One end of the second capacitor C 2 is connected with described P1 end, and the other end is connected with described P2 end; Described P2 end is connected with described N2 end.
The circuit structure of the present embodiment and embodiment a are basic identical, and difference is: the present embodiment has substituted the ambipolar transient voltage suppressor diode TVS in embodiment a with semiconductor discharge tube TSS.
The course of work of the present embodiment is identical with embodiment a.
Fig. 7 is the circuit theory diagrams of embodiment f, and it is made up of power save circuit 100 and conventional AC contactor two parts; Described power save circuit 100 is four port networks that are provided with N1, N2, P1, tetra-ports of P2, it is identical with embodiment a with the method for attachment of outside each port, it is restrained device ESD, the first capacitor C 1 and the second capacitor C 2 by static and forms, circuit structure and be with the connected mode of the dynamic circuit breaker auxiliary contact K in conventional AC contactor: described dynamic circuit breaker auxiliary contact K, static restrain device ESD, the first capacitor C 1 and be in parallel after one end be connected with described N1 end, the other end is held and is connected with described P1; One end of the second capacitor C 2 is connected with described P1 end, and the other end is connected with described P2 end; Described P2 end is connected with described N2 end.
The circuit structure of the present embodiment and embodiment a are basic identical, and difference is: the present embodiment is restrained device ESD with static and substituted the ambipolar transient voltage suppressor diode TVS in embodiment a.
The course of work of the present embodiment is identical with embodiment a.
Fig. 8 is the circuit theory diagrams of embodiment g, and it is made up of power save circuit 100 and conventional AC contactor two parts; Described power save circuit 100 is four port networks that are provided with N1, N2, P1, tetra-ports of P2, it is identical with embodiment a with the method for attachment of outside each port, it is made up of varistor VDR, the first capacitor C 1 and the second capacitor C 2, circuit structure and be with the connected mode of the dynamic circuit breaker auxiliary contact K in conventional AC contactor: after described dynamic circuit breaker auxiliary contact K, varistor VDR, the first capacitor C 1 is in parallel, one end is connected with described N1 end, and the other end is held and is connected with described P1; One end of the second capacitor C 2 is connected with described P1 end, and the other end is connected with described P2 end; Described P2 end is connected with described N2 end.
The circuit structure of the present embodiment and embodiment a are basic identical, and difference is: the present embodiment has substituted the ambipolar transient voltage suppressor diode TVS in embodiment a with varistor VDR.
The course of work of the present embodiment is identical with embodiment a.
Fig. 9 is the circuit theory diagrams of embodiment h, and it is made up of power save circuit 100 and conventional AC contactor two parts; Described power save circuit 100 is four port networks that are provided with N1, N2, P1, tetra-ports of P2, it is identical with embodiment a with the method for attachment of outside each port, it is made up of the first voltage stabilizing didoe DW1, the second voltage stabilizing didoe DW2, the first capacitor C 1 and the second capacitor C 2, circuit structure and be with the connected mode of the dynamic circuit breaker auxiliary contact K in conventional AC contactor: one end of 11 ends of described dynamic circuit breaker auxiliary contact K, the negative pole of the first voltage stabilizing didoe DW1, the first capacitor C 1 is all connected with described N1 end; The other end of 12 ends of described dynamic circuit breaker auxiliary contact K, the negative pole of the second voltage stabilizing didoe DW2, the first capacitor C 1 is all connected with described P1 end; The positive pole of the first voltage stabilizing didoe DW1 is connected with the positive pole of the second voltage stabilizing didoe DW2; One end of the second capacitor C 2 is connected with described P1 end, and the other end is connected with described P2 end; Described P2 end is connected with described N2 end.
The circuit structure of the present embodiment and embodiment a are basic identical, and difference is: for the present embodiment, the first voltage stabilizing didoe DW1, the second voltage stabilizing didoe DW2 have substituted the ambipolar transient voltage suppressor diode TVS in embodiment a.
The course of work of the present embodiment is identical with embodiment a.
Figure 10 is the circuit theory diagrams of embodiment i, and it is made up of power save circuit 100 and conventional AC contactor two parts; Described power save circuit 100 is four port networks that are provided with N1, N2, P1, tetra-ports of P2, it is identical with embodiment a with the method for attachment of outside each port, it is made up of the 3rd voltage stabilizing didoe DW3, the 4th voltage stabilizing didoe DW4, the first capacitor C 1 and the second capacitor C 2, circuit structure and be with the connected mode of the dynamic circuit breaker auxiliary contact K in conventional AC contactor: one end of 11 ends of described dynamic circuit breaker auxiliary contact K, the positive pole of the 3rd voltage stabilizing didoe DW3, the first capacitor C 1 is all connected with described N1 end; The other end of 12 ends of described dynamic circuit breaker auxiliary contact K, the positive pole of the 4th voltage stabilizing didoe DW4, the first capacitor C 1 is all connected with described P1 end; The negative pole of the 3rd voltage stabilizing didoe DW3 is connected with the negative pole of the 4th voltage stabilizing didoe DW4; One end of the second capacitor C 2 is connected with described P1 end, and the other end is connected with described P2 end; Described P2 end is connected with described N2 end.
The circuit structure of the present embodiment and embodiment a are basic identical, and difference is: for the present embodiment, the 3rd voltage stabilizing didoe DW3, the 4th voltage stabilizing didoe DW4 have substituted the ambipolar transient voltage suppressor diode TVS in embodiment a.
The course of work of the present embodiment is identical with embodiment a.
More than disclose technical scheme of the present invention, and be illustrated by above-described embodiment.Those skilled in the art are to be understood that: above-described embodiment is of the present invention illustrating; not limit the invention in the described scope of above-described embodiment; all modification of doing according to training centre of the present invention, amendment or alternative, all should be in the protection range that the claims in the present invention book defines.
Claims (2)
1. a power save circuit for A.C. contactor, is characterized in that: described power save circuit is four port networks that are provided with N1, N2, P1, tetra-ports of P2, and port N1, N2 are two input port, and P1, P2 are two output port; Described input port N1 was both connected and was also connected with 11 ends of dynamic circuit breaker auxiliary contact K with the S1 end of AC voltage; Described output port P1 had both been connected with 12 ends of described dynamic circuit breaker auxiliary contact K also and had been connected with the A1 end of the magnet exciting coil L of A.C. contactor; Described input port N2 is connected with the S2 of AC voltage end, and described output port P2 is connected with the A2 end of described magnet exciting coil L; Wherein,
(a), described dynamic circuit breaker auxiliary contact K, ambipolar transient voltage suppressor diode TVS, the first capacitor C 1 be in parallel after one end is connected with described N1 end, the other end is held and is connected with described P1; One end of the second capacitor C 2 is connected with described P1 end, and the other end is connected with described P2 end; Described P2 end is connected with described N2 end;
Or be that 11 ends of (b), described dynamic circuit breaker auxiliary contact K, the positive pole of the first monopole type transient voltage suppressor diode TVS1, one end of the first capacitor C 1 are all connected with described N1 end; The other end of 12 ends of described dynamic circuit breaker auxiliary contact K, the positive pole of the second monopole type transient voltage suppressor diode TVS2, the first capacitor C 1 is all connected with described P1 end; The negative pole of the first monopole type transient voltage suppressor diode TVS1 is connected with the negative pole of the second monopole type transient voltage suppressor diode TVS2; One end of the second capacitor C 2 is connected with described P1 end, and the other end is connected with described P2 end; Described P2 end is connected with described N2 end;
Or be that 11 ends of (c), described dynamic circuit breaker auxiliary contact K, the negative pole of the 3rd monopole type transient voltage suppressor diode TVS3, one end of the first capacitor C 1 are all connected with described N1 end; The other end of 12 ends of described dynamic circuit breaker auxiliary contact K, the negative pole of the 4th monopole type transient voltage suppressor diode TVS4, the first capacitor C 1 is all connected with described P1 end; The positive pole of the 3rd monopole type transient voltage suppressor diode TVS3 is connected with the positive pole of the 4th monopole type transient voltage suppressor diode TVS4; One end of the second capacitor C 2 is connected with described P1 end, and the other end is connected with described P2 end; Described P2 end is connected with described N2 end;
Or be that after (d), described dynamic circuit breaker auxiliary contact K, gas discharge tube (gaseous discharge tube) GDT, the first capacitor C 1 are in parallel, one end is connected with described N1 end, the other end is connected with described P1 end; One end of the second capacitor C 2 is connected with described P1 end, and the other end is connected with described P2 end; Described P2 end is connected with described N2 end;
Or be that after (e), described dynamic circuit breaker auxiliary contact K, semiconductor discharge tube (thyristor surge suppressors) TSS, the first capacitor C 1 are in parallel, one end is connected with described N1 end, the other end is connected with described P1 end; One end of the second capacitor C 2 is connected with described P1 end, and the other end is connected with described P2 end; Described P2 end is connected with described N2 end;
Or be that after (f), described dynamic circuit breaker auxiliary contact K, static supression device (Electro-Static discharge) ESD, the first capacitor C 1 are in parallel, one end is connected with described N1 end, the other end is connected with described P1 end; One end of the second capacitor C 2 is connected with described P1 end, and the other end is connected with described P2 end; Described P2 end is connected with described N2 end;
Or be that after (g), described dynamic circuit breaker auxiliary contact K, varistor VDR, the first capacitor C 1 are in parallel, one end is connected with described N1 end, the other end is connected with described P1 end; One end of the second capacitor C 2 is connected with described P1 end, and the other end is connected with described P2 end; Described P2 end is connected with described N2 end;
Or be that 11 ends of (h), described dynamic circuit breaker auxiliary contact K, the negative pole of the first voltage stabilizing didoe DW1, one end of the first capacitor C 1 are all connected with described N1 end; The other end of 12 ends of described dynamic circuit breaker auxiliary contact K, the negative pole of the second voltage stabilizing didoe DW2, the first capacitor C 1 is all connected with described P1 end; The positive pole of the first voltage stabilizing didoe DW1 is connected with the positive pole of the second voltage stabilizing didoe DW2; One end of the second capacitor C 2 is connected with described P1 end, and the other end is connected with described P2 end; Described P2 end is connected with described N2 end;
Or be (i), 11 ends of described dynamic circuit breaker auxiliary contact K, the positive pole of the 3rd voltage stabilizing didoe DW3, one end of the first capacitor C 1 are all connected with described N1 end; The other end of 12 ends of described dynamic circuit breaker auxiliary contact K, the positive pole of the 4th voltage stabilizing didoe DW4, the first capacitor C 1 is all connected with described P1 end; The negative pole of the 3rd voltage stabilizing didoe DW3 is connected with the negative pole of the 4th voltage stabilizing didoe DW4; One end of the second capacitor C 2 is connected with described P1 end, and the other end is connected with described P2 end; Described P2 end is connected with described N2 end.
2. power save circuit as claimed in claim 1, is characterized in that:
The S1 end of described AC voltage, S2 end are preferably and can reciprocity connect;
11 ends, 12 ends of described dynamic circuit breaker auxiliary contact K are preferably and can reciprocity connect;
The A1 end of described magnet exciting coil L, A2 end are preferably and can reciprocity connect.
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| CN201410125394.3A CN103871783B (en) | 2014-03-31 | 2014-03-31 | The power save circuit of A.C. contactor |
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| CN201410125394.3A CN103871783B (en) | 2014-03-31 | 2014-03-31 | The power save circuit of A.C. contactor |
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| JPH0855551A (en) * | 1994-06-07 | 1996-02-27 | Mitsuba Electric Mfg Co Ltd | Relay drive circuit |
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| CN103871783B (en) | 2015-11-18 |
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