CN101226855B - Anti-dazzling-electric exterior adjustable delay time type permanent magnetism type AC contactor - Google Patents
Anti-dazzling-electric exterior adjustable delay time type permanent magnetism type AC contactor Download PDFInfo
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- CN101226855B CN101226855B CN2008100188759A CN200810018875A CN101226855B CN 101226855 B CN101226855 B CN 101226855B CN 2008100188759 A CN2008100188759 A CN 2008100188759A CN 200810018875 A CN200810018875 A CN 200810018875A CN 101226855 B CN101226855 B CN 101226855B
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Abstract
The invention relates to a permanent-magnet alternating current contractor capable of anti-panting electricity and adjusting delaying time externally, which comprises a permanent magnet, a magnetic yoke, a coil, an armature iron and an impulsing circuit, wherein the impulsing circuit includes a rectification circuit, a second varistor sampling circuit and the like. The invention is characterized in that two capacitors with large capacity are connected in parallel beside a capacitor in the sampling circuit, two ends of a sampling resistor in the sampling circuit are connected in parallel with a circuit formed by connecting the adjustable resistor and a resistor, the adjustable resistor is provided with an adjusting handle, the end of the adjusting handle extends outside the contractor. The invention arranges capacitors with large capacity in the sampling circuit, can realize time releasing of the contactor, installs button switches in the front of the capacitors, can select time releasing and instantaneous releasing, and can adjust length of time releasing time by the adjusting resistor. Further the invention can absorb switching overvoltage and circuit earth leakage voltage in circuits, increase anti-interference ability simultaneously with improving the anti-panting ability, and protect electronic elements in circuits. The operation is reliable and the applicability is wide.
Description
Technical field
The present invention relates to a kind of A.C. contactor, especially relate to a kind of time type permanent-magnetic AC contact, belong to AC/DC contactor, relay, high-low pressure circuit breaker class contactor control device technical field with anti-dazzling-electric exterior adjustable delay release function.
Background technology
Permanent-magnetic AC contact is subjected to common concern in recent years owing to have remarkable advantages such as the source of trouble is few, noise is little, operation energy consumption is low.Its typical structure is: permanent magnet and solenoid are installed in the shell frame that yoke constitutes, settle the armature that can between two settling positions, move in the coil, by pulse excitation circuit discharging and recharging to SCR control electric capacity, make and on solenoid, produce positive and negative electric pulse, and then produce respectively and permanent magnet in the same way or during reverse magnetic field, armature will move to two settling positions respectively, realizes required circuit branch, closes control thereby drive the execution member.
Fig. 1 is the permanent-magnetic AC contact pulse excitation circuit schematic diagram of prior art, as shown in Figure 1, the pulse excitation circuit of existing permanent-magnetic AC contact mainly comprises charge-discharge circuit and controllable silicon positive and negative pulse energized circuit that rectification circuit, the first piezo-resistance circuits for triggering, the second piezo-resistance sample circuit, transistor amplifier, coil capacity are connected into; The output connecting triggering circuit of rectification circuit, circuits for triggering are connected across between the positive pole and trigger electrode of forward exciting controllable silicon DG1; The output of forward exciting controllable silicon DG1 constitutes the forward energized circuit by coil L and capacitor C 4, the C5 of charge-discharge circuit; The nominal voltage of the second piezo-resistance YR2 is less than the first piezo-resistance YR1, the output of rectification circuit accesses the sample circuit, the output of sample circuit connects the base stage of amplifying circuit triode Q1, amplifying circuit is connected across between the negative pole and trigger electrode of reverse exciting controllable silicon DG2, and oppositely the output of exciting controllable silicon DG2 constitutes reverse energized circuit by capacitor C 4, C5 and the coil L of charge-discharge circuit.
Above-mentioned pulse excitation circuit is by the reverse exciting controllable silicon DG2 of triode Q1 clamper of sample circuit control, and utilize the difference of the first piezo-resistance YR1 and the second piezo-resistance YR2, guarantee the not conducting simultaneously of controllable silicon of positive and negative electric pulse in carrying out member branch, closing operation, guaranteed the reliability and the antijamming capability of pulse excitation circuit; Secondly, the change by armature, magnetic yoke structure and movement position relation simplifies the structure, and has guaranteed the reliable and stable of operating mechanism combined floodgate control position state.
Though above-mentioned permanent-magnetic AC contact pulse excitation circuit has plurality of advantages, also there is following shortcoming simultaneously:
1, owing to capacitor C 3 capacity in the circuit are less, can only play filter action, under the situation of the unexpected instant cut-off of circuit, its electric weight that outwards discharges is less, can not keep the voltage of triode Q1 ground level, oppositely controllable silicon DG2 makes contactor discharge immediately because of voltage reduces conducting, and anti-rolling electricity (circuit momentary power failure) function is relatively poor;
2, because the resistance R 14 in the sample circuit is a fixed resistance value resistance, make the voltage of ground level of triode Q1 to change like this, even change the capacity of electric capacity, contactor exists certain time-delay to discharge, but delayed release time is fixed, and can't regulate as required;
3, have more electric capacity, coil in circuit, be easy to generate line electrical leakage voltage, promptly induced voltage when induced voltage is higher, causes the non-shut-brake phenomenon of contactor easily, and antijamming capability is not strong;
4, when main contact disjunction or adhesive, inductive load or capacitive load can produce moment negative peak high voltage, i.e. switching overvoltage, and switching overvoltage is damaged very big to the electronic component of inner control section, cause electronic component to puncture easily.
Summary of the invention
For solving above-mentioned the deficiencies in the prior art, the object of the present invention is to provide a kind of time type permanent-magnetic AC contact with anti-dazzling-electric exterior adjustable delay release function, prevent that the instant cut-off contactor from discharging, and realize that delayed release time is adjustable.
For achieving the above object, the present invention is achieved by the following technical solutions:
A kind of anti-dazzling-electric exterior adjustable delay time type permanent magnetism type A.C. contactor, comprise permanent magnet, yoke, coil, armature and pulse excitation circuit, described pulse excitation circuit comprises charge-discharge circuit and the forward and reverse energized circuit of controllable silicon that rectification circuit, the first piezo-resistance circuits for triggering, the second piezo-resistance sample circuit, transistor amplifier, coil become with capacitances in series; The output connecting triggering circuit of rectification circuit, circuits for triggering are connected across between the positive pole and trigger electrode of forward exciting controllable silicon; The output of forward exciting controllable silicon constitutes the forward energized circuit by the coil and the electric capacity of charge-discharge circuit; The nominal voltage of second piezo-resistance is less than first piezo-resistance, the output of rectification circuit accesses the sample circuit, the output of sample circuit connects the base stage of amplifying circuit triode, amplifying circuit is connected across between the negative pole and trigger electrode of reverse exciting controllable silicon, and oppositely the output of exciting controllable silicon constitutes reverse energized circuit by the electric capacity and the coil of charge-discharge circuit; It is characterized in that other two electric capacity that capacity is bigger in parallel of electric capacity in the sample circuit; In described sample circuit, its sample resistance two ends circuit that is unified into by adjustable resistance and resistance string in parallel is equipped with regulating handle on the described adjustable resistance, and the tail end of described regulating handle reaches the outside of contactor.
Aforesaid anti-dazzling-electric exterior adjustable delay time type permanent magnetism type A.C. contactor, it is characterized in that in pulse excitation circuit, setting up a shift knob, described shift knob comprises two normally closed auxiliary contacts, a normally closed auxiliary contact is located at the input of the bigger electric capacity of described two capacity, another normally closed auxiliary contact is located on the electric power incoming line of contactor control section, two auxiliary contact synchronization actions.
Aforesaid anti-dazzling-electric exterior adjustable delay time type permanent magnetism type A.C. contactor is characterized in that setting up the resistance that absorbs line electrical leakage voltage in the electric power incoming line of contactor control section, in parallel with the electric capacity in the electric power incoming line of contactor control section.
Aforesaid anti-dazzling-electric exterior adjustable delay time type permanent magnetism type A.C. contactor is characterized in that setting up the 4th piezo-resistance that absorbs switching overvoltage in the electric power incoming line of contactor control section, and is in parallel with above-mentioned resistance and electric capacity.
Aforesaid anti-dazzling-electric exterior adjustable delay time type permanent magnetism type A.C. contactor is characterized in that the absorption Disturbance in Power Net clutter circuit that connecting resistance constitutes between described sample circuit input and the ground.
Aforesaid anti-dazzling-electric exterior adjustable delay time type permanent magnetism type A.C. contactor is characterized in that connecing reverse-biased diode between the negative pole of described forward exciting controllable silicon and the trigger electrode.
Aforesaid anti-dazzling-electric exterior adjustable delay time type permanent magnetism type A.C. contactor is characterized in that described forward exciting controllable silicon and coil are other in parallel in order to keep the resistance of discharge voltage.
Aforesaid anti-dazzling-electric exterior adjustable delay time type permanent magnetism type A.C. contactor is characterized in that described coil two ends the 3rd piezo-resistance in parallel.
Aforesaid anti-dazzling-electric exterior adjustable delay time type permanent magnetism type A.C. contactor is characterized in that resistance in parallel is distinguished on the electric capacity side of described charge-discharge circuit.
In the work, when supply voltage surpasses the nominal voltage of circuits for triggering first piezo-resistance, the conducting of forward exciting controllable silicon, the coil charges excitation, the armature work of contactor is to the attracted position, realize required circuit combined floodgate control, after electric capacity is full of, the circuits for triggering decompression, the forward exciting controllable silicon ends, and stops the excitation of charging, this moment, sample circuit must make the amplifying circuit conducting, thereby guarantee that reverse exciting controllable silicon ends, even after this supply voltage fluctuates in certain limit, the stable state that closed magnet circuit also can holding armature is closed a floodgate; When supply voltage was lower than predetermined value or outage, sample circuit can make amplifying circuit end, thereby makes reverse exciting controllable silicon conducting, capacitor discharge makes the reverse excitation of coil, and armature motion is to another stable position, realize required circuit separating brake control, this moment, the forward exciting controllable silicon must end.When the circuit sudden power, shift knob TA can control and select contactor is that time-delay discharges or instantaneous relase.During outage, when shift knob TA was closed, the ground level voltage of triode Q1 was kept in outwards discharge of capacitor C 31, C32 (capacity is bigger), and oppositely exciting controllable silicon DG2 can not conducting, and contactor keeps attracting state.After the electric weight of electric capacity has been put, triode Q1 ground level dead electricity, oppositely exciting controllable silicon DG2 conducting, contactor discharges.If do not have at capacitor C 31, C32 under the situation of discharge off, circuit restores electricity, because triode Q1 ground level has sampling voltage all the time, contactor is in attracting state all the time, momentary power failure (rolling) to circuit has good resistance effect, guarantees the working properly of circuit.Be connected in parallel on the two ends of resistance R 14 after adjustable resistance RP and resistance R 014 series connection, the tail end of the regulating handle on the adjustable resistance RP reaches the outside of contactor, can change the resistance value of sample circuit by the position of change regulating handle, and then make the change in voltage of the ground level of triode Q1.Triode Q1 ground level voltage is heightened, and discharge is accelerated, and delay time shortens; Triode Q1 ground level voltage is turned down, and discharge is slowed down, the delay time lengthening.Can regulate as required, convenient and practical; When Push switch button TA, two normally-closed contacts of shift knob TA are opened simultaneously, and the circuit that power supply and time-delay discharge with electric capacity C31, C32 disconnects simultaneously, owing to cut off the capacitance discharges loop, and instantaneous ending of triode Q1 and make the contactor instantaneous relase.
The invention has the beneficial effects as follows: the present invention can realize that by set up the bigger electric capacity of capacity in sample circuit the time-delay of contactor discharges; Set up push-button switch before electric capacity, can realize delaying time discharges and the selection of instantaneous relase; Can realize the length adjusting of delayed release time by adjustable resistance; And can absorb switching overvoltage and line electrical leakage voltage in the circuit, improve when resisting rolling electric work energy, improve antijamming capability, and the electronic devices and components in the protection circuit.Reliable operation, applied widely.
Description of drawings
Fig. 1 is the permanent-magnetic AC contact pulse excitation circuit schematic diagram of prior art;
Fig. 2 is a permanent-magnetic AC contact pulse excitation circuit schematic diagram of the present invention.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing.
Fig. 2 is a permanent-magnetic AC contact pulse excitation circuit schematic diagram of the present invention.As shown in Figure 2, anti-dazzling-electric exterior adjustable delay time type permanent magnetism type A.C. contactor of the present invention comprises permanent magnet, yoke, coil, armature and pulse excitation circuit.In the pulse excitation circuit, four diode D1-D4 form bridge rectifier, the output of rectification circuit connects the circuits for triggering that current-limiting resistance R13 connects with the first piezo-resistance YR1 and constitutes, these circuits for triggering are connected across between the positive pole and trigger electrode of forward exciting controllable silicon DG1, and the output of this forward exciting controllable silicon DG1 constitutes the forward energized circuit with the coil L that connects and charge and discharge capacitance C4, C5.In addition, the output of rectification circuit also connects the second piezo-resistance YR2, the diode D9 of series connection according to the order of sequence, the sample circuit (calibration value of YR2 is less than YR1) that resistance R 14 constitutes, the output of this sample circuit connects the base stage of amplifying circuit triode Q1, the collector and emitter of this triode QI is connected across between the trigger electrode and negative pole of reverse exciting controllable silicon DG2, and charge and discharge capacitance C4, the C5 of series connection and coil L constitute reverse energized circuit by diode D7, resistance R 4, diode D8 and resistance R 5, R6 and reverse exciting controllable silicon DG2.In contactor control section electric power incoming line, also be connected to resistance R 01 and the 4th piezo-resistance YR01, in parallel with capacitor C 1.Resistance R 01 is in order to absorb line electrical leakage voltage, and is working properly to guarantee sample circuit, prevents the non-shut-brake phenomenon of contactor that causes owing to induced voltage is higher, with the C1 acting in conjunction, increases antijamming capability.The 4th piezo-resistance is used to absorb switching overvoltage (when main contact disjunction or adhesive inductive load or capacitive load, can produce moment negative peak overvoltage), and the electronic devices and components of protection internal control part are not damaged by over-voltage breakdown.In sample circuit, establish two capacitor C 31, C32 (its capacity is greater than capacitor C 3) that capacity is bigger, in parallel with original capacitor C 3.By the circuit that adjustable resistance RP and resistance R 014 are connected into, on adjustable resistance RP regulating handle is housed in the two ends parallel connection of the resistance R 14 of sample circuit, the tail end of regulating handle reaches the outside of contactor.In addition, in pulse excitation circuit, set up a shift knob TA, shift knob TA comprises two normally closed auxiliary contacts, a normally closed auxiliary contact is located at the bigger capacitor C 31 of described two capacity, the input of C32, another normally closed auxiliary contact is located on the electric power incoming line of contactor control section, two auxiliary contact synchronization actions.
In the work, when control voltage is higher than predetermined value (for example being 150V), the first piezo-resistance YR1 is breakdown, trigger current is A → D5 → R13 → YR1 → DG1 trigger electrode from Fig. 2, make forward exciting controllable silicon DG1 conducting, the forward exciting current is by A point → D6 → L → C4 → C5 → B point, and pulse excitation circuit adds the forward exciting current to the coil of contactor as a result, the armature adhesive; After this forward exciting controllable silicon DG1 ends fast because of charge and discharge capacitance C4, C5 are full of electricity, thereby keeps stable attracting state.In the above process,, therefore guarantee that by triode Q1 reverse exciting controllable silicon DG2 reliably ends because the second piezo-resistance YR2 punctures earlier.
When control voltage is lower than calibration value (for example being 100V) or is zero, the second piezo-resistance YR2 does not puncture, triode Q1 enters cut-off state rapidly because of no base current, charge and discharge capacitance C4, C5 both end voltage are added on the reverse exciting controllable silicon DG2, make reverse exciting controllable silicon DG2 conducting, reverse exciting current C4 → L → D7 → D8 → R5 → R6 → DG2 → C5 → C4 from Fig. 2 adds the reverse impulse electric current to the coil of contactor, make the armature disjunction, and the stable state when keeping disjunction.In the above process, forward exciting controllable silicon DG1 remains cut-off state.
The time-delay or the instantaneous relase of shift knob TA control contactor.During the circuit sudden power, as Push switch button TA owing to cut off the discharge loop of power supply and capacitor C 31, C32, triode Q1 instantaneous by and make the contactor instantaneous relase; When shift knob TA was closed, capacitor C 31, C32 outwards discharged, and keep the ground level voltage of triode Q1, and oppositely exciting controllable silicon DG2 can not conducting, and contactor keeps attracting state.After the electric weight of electric capacity has been put, triode Q1 ground level dead electricity, oppositely exciting controllable silicon DG2 conducting, contactor discharges.If do not have at capacitor C 31, C32 under the situation of discharge off, circuit restores electricity, because triode Q1 ground level has sampling voltage all the time, contactor is in attracting state all the time, momentary power failure (rolling) to circuit has good resistance effect, guarantees the working properly of circuit.If do not need the instantaneous relase function, can be with the normally-closed contact short circuit before capacitor C 31, the C32.
Can change the resistance value of sample circuit by the position of regulating the regulating handle on the adjustable resistance RP simultaneously, and then regulate the voltage of triode Q1 ground level, change the discharge time of capacitor C 31, C32, regulate the delayed release time of contactor.Triode Q1 ground level voltage is heightened, and discharge is accelerated, and delay time shortens; Triode Q1 ground level voltage is turned down, and discharge is slowed down, the delay time lengthening.Regulating handle reaches the outside, the convenient adjusting.
The amount of capacity of capacitor C 31, C32 can be selected according to the length needs of delayed release time, satisfies various needs, and is widely applicable.
In addition, above circuit also has following characteristics:
1, connects the absorption Disturbance in Power Net clutter circuit that series resistance R1, R2 constitute between sample circuit input and the ground, be used to absorb the Disturbance in Power Net clutter, thereby strengthen the antijamming capability of entire circuit;
2, between the negative pole of forward exciting controllable silicon DG1 and trigger electrode, meet diode D6, D7, therefore when the reverse excitation of capacitor discharge, can between forward exciting controllable silicon DG1 is because of its negative pole and trigger electrode, have a reversed bias voltage further to guarantee to end;
3, coil L two ends the 3rd piezo-resistance YR3 in parallel can prevent to damage electronic component by the overvoltage that is created in the coil two ends fast because of forward exciting controllable silicon DG1;
4, at other each resistance R 11 in parallel of charge and discharge capacitance C4, C5, R12, cause one of them overvoltage to avoid capacitor voltage equalizing not wait;
5, the bigger resistance R 3 of the other resistance in parallel of forward exciting controllable silicon DG1 and coil L can compensate for losses, keeps charge and discharge capacitance C4, C5 to have enough discharge voltages.
In addition to the implementation, the present invention can also have other execution modes.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in protection scope of the present invention.
Claims (9)
1. anti-dazzling-electric exterior adjustable delay time type permanent magnetism type A.C. contactor, comprise permanent magnet, yoke, coil, armature and pulse excitation circuit, described pulse excitation circuit comprises charge-discharge circuit and the forward and reverse pulsed field magnetization of the controllable silicon loop that rectification circuit, the first piezo-resistance circuits for triggering, the second piezo-resistance sample circuit, transistor amplifier, coil become with capacitances in series; The output connecting triggering circuit of rectification circuit, circuits for triggering are connected across between the positive pole and trigger electrode of forward exciting controllable silicon; The output of forward exciting controllable silicon constitutes the direct impulse energized circuit by the coil and the electric capacity of charge-discharge circuit; The nominal voltage of second piezo-resistance is less than first piezo-resistance, the output of rectification circuit accesses the sample circuit, the output of sample circuit connects the base stage of amplifying circuit triode, amplifying circuit is connected across between the negative pole and trigger electrode of reverse exciting controllable silicon, and oppositely the output of exciting controllable silicon constitutes the reverse impulse energized circuit by the electric capacity and the coil of charge-discharge circuit; It is characterized in that other two electric capacity that capacity is bigger in parallel of electric capacity in the sample circuit; In described sample circuit, its sample resistance two ends circuit that is unified into by adjustable resistance and resistance string in parallel is equipped with regulating handle on the described adjustable resistance, and the tail end of described regulating handle reaches the outside of contactor.
2. anti-dazzling-electric exterior adjustable delay time type permanent magnetism type A.C. contactor according to claim 1, it is characterized in that in pulse excitation circuit, setting up a shift knob, described shift knob comprises two normally closed auxiliary contacts, a normally closed auxiliary contact is located at the input of the bigger electric capacity of described two capacity, another normally closed auxiliary contact is located on the electric power incoming line of contactor control section, two auxiliary contact synchronization actions.
3. anti-dazzling-electric exterior adjustable delay time type permanent magnetism type A.C. contactor according to claim 1, it is characterized in that in the electric power incoming line of contactor control section, setting up the resistance that absorbs line electrical leakage voltage, in parallel with the electric capacity in the electric power incoming line of contactor control section.
4. anti-dazzling-electric exterior adjustable delay time type permanent magnetism type A.C. contactor according to claim 3, it is characterized in that in the electric power incoming line of contactor control section, setting up the 4th piezo-resistance that absorbs switching overvoltage, in parallel with resistance and electric capacity in the electric power incoming line of above-mentioned contactor control section.
5. anti-dazzling-electric exterior adjustable delay time type permanent magnetism type A.C. contactor according to claim 1 is characterized in that the absorption Disturbance in Power Net clutter circuit that connecting resistance constitutes between described sample circuit input and the ground.
6. anti-dazzling-electric exterior adjustable delay time type permanent magnetism type A.C. contactor according to claim 1 is characterized in that connecing reverse-biased diode between the negative pole of described forward exciting controllable silicon and the trigger electrode.
7. anti-dazzling-electric exterior adjustable delay time type permanent magnetism type A.C. contactor according to claim 1 is characterized in that described forward exciting controllable silicon and coil are other in parallel in order to keep the resistance of discharge voltage.
8. anti-dazzling-electric exterior adjustable delay time type permanent magnetism type A.C. contactor according to claim 1 is characterized in that described coil two ends the 3rd piezo-resistance in parallel.
9. anti-dazzling-electric exterior adjustable delay time type permanent magnetism type A.C. contactor according to claim 1 is characterized in that resistance in parallel is distinguished on the electric capacity side of described charge-discharge circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008100188759A CN101226855B (en) | 2008-01-29 | 2008-01-29 | Anti-dazzling-electric exterior adjustable delay time type permanent magnetism type AC contactor |
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| CN2008100188759A CN101226855B (en) | 2008-01-29 | 2008-01-29 | Anti-dazzling-electric exterior adjustable delay time type permanent magnetism type AC contactor |
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| CN101226855B true CN101226855B (en) | 2011-02-09 |
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| CN102244374B (en) * | 2011-07-16 | 2013-12-11 | 合肥天海电气技术有限公司 | Intelligent digital-variable delayed anti-flashover device |
| CN114068248B (en) * | 2020-08-05 | 2024-08-09 | 广州贵冠科技有限公司 | Delay circuit and method for reducing relay actuation |
| CN115549557B (en) * | 2022-10-19 | 2023-07-18 | 零点创新科技有限公司 | Quick frequency elimination algorithm for motor interference-free control device |
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Granted publication date: 20110209 Termination date: 20170129 |