CN102768923A - Undervoltage tripper and working method thereof - Google Patents
Undervoltage tripper and working method thereof Download PDFInfo
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- CN102768923A CN102768923A CN2012102251397A CN201210225139A CN102768923A CN 102768923 A CN102768923 A CN 102768923A CN 2012102251397 A CN2012102251397 A CN 2012102251397A CN 201210225139 A CN201210225139 A CN 201210225139A CN 102768923 A CN102768923 A CN 102768923A
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Abstract
The invention relates to an undervoltage tripper, comprising a rectification circuit, an electromagnet coil, am armature, a buck circuit, a relay, a sampling circuit and a main control module, wherein the rectification circuit is connected with an external power grid, and the armature is controlled by the electromagnet coil; the main control module stores a rated voltage Ue and a strong start voltage value and is used for collecting an output voltage and a voltage period of the sampling circuit, so that an effective value and a pulse direct current voltage value of the external power grid are calculated; when the voltage of the external power grid reaches to 80% of the rated voltage Ue, and the pulse direct current voltage reaches to the strong start voltage value, a normally open contact is closed firstly, and a switch circuit is turned on, after the armature is closed, the normally open contact is disconnected; and when the voltage of the external power grid is less than 50% of the rated voltage Ue, the switch circuit is turned off. The tripper is reliable in closing, small in coil heating value, strong in anti-interference capacity, and applicable to frequency conversion occasions like generators.
Description
Technical field
The present invention relates to a kind of device for under-voltage releasing equipment and method of work thereof of low-power consumption.
Background technology
Device for under-voltage releasing equipment is a circuit breaker, especially one of critical elements of frame-type circuit breaker.Under-voltage release is when its terminal voltage is reduced to a certain prescribed limit; Make circuit breaker that a kind of release of delaying time or not having the time-delay disconnection arranged; When supply voltage descends (even slowly descending) in 70% to 35% scope of rated operational voltage; Under-voltage release should move (trip coil dead electricity; Moving armature has back-moving spring to eject-thread off in the coil), under-voltage release equals 35% o'clock of release rated operational voltage at supply voltage, and under-voltage release should be able to prevent breaker closing; When supply voltage is equal to or greater than the rated operational voltage of 85% under-voltage release; Under hot condition; Should be able to guarantee that (trip coil gets the reliable closure of circuit breaker; The interior moving armature of coil has the coil electromagnetic force to overcome the spring force suction and keeps certain moment-" adhesive ", and closing a floodgate for circuit breaker is reliable provides condition).
The essence of undervoltage tripping, be prevent circuit breaker subordinate electric equipment be operated under the under-voltage condition electric current excessive after, the effective measures that the electric equipment self-heating increases the weight of.
The comparatively simple mostly or imperfection of existing device for under-voltage releasing equipment, circuit design is disturbing near the circuit breaker of comparatively serious occasion, especially intermediate frequency use occasion, and device for under-voltage releasing equipment wherein usually receives intermediate frequency and disturbs and misoperation.Perhaps in the occasion of marine generator frequency change, because of frequency change causes the device for under-voltage releasing equipment misoperation.The misoperation of device for under-voltage releasing equipment has caused the mistake separating brake of circuit breaker.
Summary of the invention
The technical problem that the present invention will solve provides a kind of can the startup fast, and realizes the device for under-voltage releasing equipment and the method for work thereof of low-power consumption.
For solving the problems of the technologies described above, the present invention provides a kind of device for under-voltage releasing equipment of low-power consumption, comprising: the rectification circuit that links to each other with external power grid, electromagnet coil, by the armature of said electromagnet coil control; Reduction voltage circuit, its input links to each other with the positive output end of said rectification circuit, its output links to each other with the current input terminal of said electromagnet coil, is used to provide the voltage of keeping the armature adhesive; Relay, one of which links to each other with the output of said rectification circuit and the current input terminal of said electromagnet coil respectively to normally opened contact; Switching circuit, its current input terminal links to each other with the current output terminal of said electromagnet coil; Sample circuit is used to detect the magnitude of voltage of said rectification circuit output ripple direct current; Main control module stores rated voltage Ue and the strong magnitude of voltage that starts, effective value and the said pulsating dc voltage value of output voltage to calculate external power grid voltage that is used to gather said sample circuit; Be suitable for reaching 80% of rated voltage Ue when the voltage of said external power grid; And when said pulsating dc voltage reached the magnitude of voltage of said strong startup, the said normally opened contact of control was closed earlier, the said switching circuit conducting of back control; After treating said armature adhesive, control said normally opened contact again and break off; If the voltage of said external power grid is lower than at 50% o'clock of rated voltage Ue, then controls said switching circuit and break off.
Said main control module also is used for: according to the rise of output voltage of gathering said sample circuit along or trailing edge obtain the frequency or the cycle of said dispatch from foreign news agency netting twine voltage, to calculate said external power grid voltage effective value.The present invention detects the magnitude of voltage and the cycle of sampling earlier through said main control module; To obtain the voltage effective value accurately of outer net; And sample circuit is located at after the rectification circuit, can effectively reduce the interference of the harmonic wave in the outer net voltage, saidly can judge more accurately whether the outer net voltage effective value reaches 80% of rated voltage Ue; So this release also is fit to apply to the occasion of different frequency very much, be particularly suitable for the alternating voltage that frequency is 20Hz～65Hz.So can also solve the device for under-voltage releasing equipment that second technical problem provides a kind of anti-harmonic wave and be applicable to the multi-frequency power supply.
Said main control module can be single-chip microcomputer (MCU), SOC(system on a chip) (SOC), CPLD, FPGA or the ARM and the DSP of any model.
Further, in order better to avoid harmonic wave in the electrical network, establish an EMC (electromagnetic compatibility) power-supply filter at the input of said rectification circuit to the interference of release.The EMC power-supply filter; Have another name called " Electro Magnetic Compatibility filter "; Be mainly used in instrument and meter, the automation control system; Be used for suppressing and eliminate on-the-spot strong electromagnetic of industrial automation system and electric spark interference, proofread and correct the field instrumentation instrument, guarantee the safe and reliable operation of automation control system
Further; In order to make said solenoid obtain high pressure; Establish the last one at said reduction voltage circuit input and start capacitor C 1, charging voltage is
doubly the 3-5 of electromagnet coil rated operational voltage (is about doubly) of input ac voltage.Switching circuit is connected moment, and storage capacitor C1 goes up electric charge and all discharges through solenoid, reaches the purpose of " the strong startup " adhesive.
Further, in order to make the charging voltage (VH) on the storage capacitor C1, do not influence the information of electrical network pulsating voltage (SP).For resolving line voltage cycle, harmonic wave, convenience is provided.In said sample circuit, establish an isolating diode D1; Concrete connected mode is that said sample circuit comprises: frequency and cycle detection circuit, isolating diode D1, pulsating dc voltage sample circuit; The output of said rectification circuit links to each other with the input of said frequency and cycle detection circuit, the anode of said isolating diode, and the negative electrode of said isolating diode links to each other with the input of said pulsating dc voltage sample circuit, reduction voltage circuit; The output of said frequency and cycle detection circuit, pulsating dc voltage sample circuit links to each other with said main control module.
Further, in order to use in the occasion that is needing delayed releasing, said main control module is a single chip circuit, and it comprises: what link to each other with single-chip microcomputer is suitable for setting the BCD toggle switch that the said switching circuit of control is delayed time opening time.
Further, in order to prevent pouring in down a chimney of VH voltage, stop said normally opened contact to break off the back-emf of said electromagnet coil generation of moment on the other hand, the protection reduction voltage circuit.Said device for under-voltage releasing equipment also comprises, a diode D2, and the anode of said diode D2 links to each other with the output of said reduction voltage circuit, and its negative electrode links to each other with said electromagnet coil input.
Further, the power pack of said main control module, switching circuit, relay is all provided by said reduction voltage circuit.
The method of work of above-mentioned device for under-voltage releasing equipment comprises:
1. after said device for under-voltage releasing equipment inserted the outer net electrical network, said main control module detected and calculates the effective value and the said rectification circuit output ripple dc voltage value of external power grid voltage through sample circuit;
2. the effective value when said external power grid voltage reaches 80% of described rated voltage Ue; When said pulsating dc voltage reaches the magnitude of voltage of said strong startup; Normally opened contact between the output that is connected in said rectification circuit of said main control module elder generation control relay and the current input terminal of electromagnet coil is closed, control the switching circuit conducting that links to each other with the current output terminal of said electromagnet coil again; So that said electromagnet coil gets is electric, i.e. armature adhesive;
Then, control said normally opened contact and break off, promptly only the voltage of keeping said armature adhesive is provided by said reduction voltage circuit;
3. when said external power grid voltage be lower than described rated voltage Ue 50% the time, the said switching circuit of then said master control module controls breaks off so that said electromagnet coil dead electricity, promptly armature ejects.
The present invention has the following advantages: (1) makes release ability high voltage startup, low voltage sustain through reduction voltage circuit, main control module, switching circuit, relay cooperating, makes the release adhesive reliable, and the coil heating amount is little, realizes low-power consumption; (2) guarantee starting resistor through the strong startup capacitor C 1 that connects, realized absolutely armature adhesive; (3) pass through single-chip microcomputer and sample circuit to the detection of mains frequency, further obtain effective value accurately, can guarantee that the armature adhesive reaches enough rated voltages, and open up the use occasion of release; (4) can effectively remove the interference of harmonic wave in the electrical network to the collection of mains frequency, cooperate, more can effectively avoid the Harmonic Interference in the electrical network with EMC bidirectional filtering power-supply filter.
Description of drawings
For content of the present invention is more clearly understood, below basis specific embodiment and combine accompanying drawing, the present invention is done further detailed explanation, wherein
Fig. 1 is the anti-humorous circuit structure diagram one that involves the device for under-voltage releasing equipment of full rate of the present invention;
Fig. 2 is the anti-humorous circuit structure diagram two that involves the device for under-voltage releasing equipment of full rate of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is elaborated:
The parameter designing of interchange shunt release of the present invention meets the important technological parameters that low voltage switchgear and control appliance standard: GB14048.1-2006 and GB14048.2-2008 have defined device for under-voltage releasing equipment.Under the requirement of this standard, the following examples of giving an example describe.
See Fig. 1, a kind of device for under-voltage releasing equipment comprises: the rectification circuit 1 that links to each other with external power grid, electromagnet coil 3, by the armature of said electromagnet coil 3 controls; Reduction voltage circuit 2, its input links to each other with the positive output end of said rectification circuit 1, its output links to each other with the current input terminal of said electromagnet coil 3, is used to provide the voltage of keeping the armature adhesive; Relay 4, one of which links to each other with the output of said rectification circuit 1 and the current input terminal of said electromagnet coil 3 respectively to normally opened contact; Switching circuit 7, its current input terminal links to each other with the current output terminal of said electromagnet coil 3; Sample circuit 6 is used to detect the magnitude of voltage of said rectification circuit 1 output ripple direct current; Main control module 8 stores rated voltage Ue and the strong magnitude of voltage that starts, effective value and the said pulsating dc voltage value of output voltage to calculate external power grid voltage that is used to gather said sample circuit 6; Be suitable for reaching 80% of rated voltage Ue when the voltage of said external power grid; And when said pulsating dc voltage reached the magnitude of voltage of said strong startup, the said normally opened contact of control was closed earlier, said switching circuit 7 conductings of back control; After treating said armature adhesive, control said normally opened contact again and break off; If the voltage of said external power grid is lower than at 50% o'clock of rated voltage Ue, then controls said switching circuit 7 and break off.
Said main control module 8 also is used for: according to the rise of output voltage of gathering said sample circuit 6 along or trailing edge obtain the frequency or the cycle of said dispatch from foreign news agency netting twine voltage, to calculate said external power grid voltage effective value.
Establish an EMC power-supply filter at the input of said rectification circuit 1.
Establish the last one at said reduction voltage circuit 2 inputs and start capacitor C 1.
Said sample circuit 6 comprises: frequency and cycle detection circuit 6-1, isolating diode D1, pulsating dc voltage sample circuit; The output of said rectification circuit 1 links to each other with the input of said frequency and cycle detection circuit, the anode of said isolating diode D1, and the negative electrode of said isolating diode D1 links to each other with the input of said pulsating dc voltage sample circuit, reduction voltage circuit 2; The output of said frequency and cycle detection circuit, pulsating dc voltage sample circuit links to each other with said main control module 8.
Said main control module 6 is a single chip circuit, and it comprises: being suitable for of linking to each other with single-chip microcomputer set the said switching circuit of the control BCD toggle switch of 7 time-delay opening times.
Said device for under-voltage releasing equipment also comprises, a diode D2, and the anode of said diode D2 links to each other with the output of said reduction voltage circuit 2, and its negative electrode links to each other with said electromagnet coil 3 inputs.
Embodiment 2
See Fig. 1-2, on the basis of embodiment 1, the execution mode of this device for under-voltage releasing equipment major part is described.
The all-wave pulsating voltage is isolated the voltage VH after said strong startup capacitor C 1 charging by said isolating diode D1, does not influence pulsating voltage SP.VH voltage provides said main control module 8 said relays 4 and switching circuit 7 working powers after reduction voltage circuit 2 step-downs are arranged, and it is said electromagnet coil 3 power supplies that said reduction voltage circuit 2 forms voltage VO voltage VP after diode D2 isolates.Resistance R 1 and R2 form the sampling circuit of VH, and sampled signal SH send said main control module 8.Pulsating voltage after the full-wave rectification, frequency and cycle detection circuit 6-1 form the INT/SA signal, and said main control module 8 is resolved the INT signal and is obtained electrical network cycle time (frequency); Sampling SA several times in one-period; Use methods such as FFT, calculate " effective value " of corresponding line voltage, according to effective value; Judgement was greater than 80% o'clock of nominal voltage, and said main control module 8 further judges whether voltage VH has reached certain value simultaneously.When these two conditions all satisfy; Said main control module 8 control relay make contacts are 1.-2., and for said electromagnet coil 3 provides a high starting resistor, then; The said switching circuit 7 of said main control module 8 controls is connected said electromagnet coil 3, and said electromagnet coil 3 has been realized strong startup.After strong startup was accomplished, 1. said main control module 8 controlled said relay 4 break contacts-and 2., voltage VP keeps said electromagnet coil 3 certain moments.When effective value less than nominal voltage 50% the time; The said switching circuit 7 of said main control module 8 controls breaks off the electric current of said electromagnet coil 3; Said electromagnet coil 3 inner back-moving springs eject armature, and armature backs down the circuit breaker self-locking mechanism, realizes the separating brake of circuit breaker.
Isolating diode D1 is set after full-wave rectification, makes charging voltage (VH) on the said strong startup capacitor C 1, do not influence the information of electrical network pulsating voltage (SP).For resolving line voltage cycle, harmonic wave, convenience is provided.
Among the present invention; 1. said relay 4 goes ahead of the rest make contact-2.; The starting resistor of electromagnet; Be the charging voltage (VH) of said strong startup capacitor C 1, be
times (being the several times of said electromagnet coil 3 rated operational voltages) of input ac voltage.Said switching circuit 7 is connected moment, and electric charge all discharges through said electromagnet coil 3 on the said strong startup capacitor C 1, reaches the purpose of " the strong startup " adhesive.The power of strong startup, said strong startup capacitor C 1 capacity can also come further to optimize except that satisfying the reduction voltage circuit minimum requirements through the capacitance of the said strong startup capacitor C 1 of suitable increasing.
Among the present invention, the current input terminal predetermined fixed of said electromagnet coil 3 connects voltage VP, prevents that the contact is 1.-and 2. the transition period, said electromagnet coil 3 loses voltage and breaks off voluntarily.After said electromagnet coil the last 3 starts; Keep the prime power of said electromagnet coil 3 through voltage VP, satisfy the requirement of said electromagnet coil 3 low power runs, both realized that big moment started; Make that again the whole caloric value of device for under-voltage releasing equipment is little, its circuit structure is simple.
Among the present invention; The output voltage VO of reduction voltage circuit 2 forms VP to said electromagnet coil 3 power supplies after said diode D2 isolates; Said diode D2 prevents pouring in down a chimney of VH voltage on the one hand; Stop the contact on the other hand 1.-2. break off the back-emf of said electromagnet coil 3 generations of moment, the protection reduction voltage circuit.
Among the present invention, input voltage is through full-wave rectification, and said isolating diode D1 isolates the back to said strong startup C1 charging, and generation 5V, 12V and the VO voltage of reduction voltage circuit is arranged.These three groups of voltages have nothing to do with frequency of input voltage, harmonic wave.
Among the present invention, said main control module 8 is judged the INT signal, obtains the electrical network cycle (frequency).Resolve the SA calculated signals simultaneously and go out the effective value of line voltage, effective value is corresponding with the cycle.According to effective value, judgement was greater than 80% o'clock of nominal voltage, and said main control module 8 further judges whether VH has reached certain value simultaneously.When these two conditions all satisfy; 1. said main control module 8 controls said relay 4 make contacts-2.; For said electromagnet coil 3 provides a high starting resistor, then, the said switching circuit 7 of said main control module 8 controls is connected said electromagnet coil 3; Said electromagnet coil 3 has been realized strong startup, has guaranteed absolutely adhesive.
See Fig. 1-2 on the basis of embodiment 1-2, adopting single chip circuit 8-1 with 220V voltage, said main control module 8 is example, and anti-harmonic wave, full rate device for under-voltage releasing equipment major part execution mode are described.
Line voltage connects 1 two inputs of said rectification circuit behind the EMC bidirectional filtering.The anode of said rectification circuit 1 is defined as (VH), negativing ending grounding (GND).
After powering on; Said rectification circuit 1 is dc pulse moving voltage SP with ac voltage rectifier; Charge to said strong startup capacitor C 1 through said isolating diode D1; Charging voltage VH is input ac voltage
doubly (80% effective value approximates 248V).The voltage sampling circuit 6 that this charging voltage has R1 and R2 to be composed in series, production sampled signal SH sends into single-chip microcomputer.Voltage VH supplies power to reduction voltage circuit.
The 12V (15V) that said reduction voltage circuit 2 produces supplies said switching circuit 7 and said relay 4 to use, and the 5V of generation (3.3V) supplies single chip circuit 8-1 to use, and the VO of generation (30V) is connected to the anode of said diode D2.The negative electrode of said diode D2 connects an end of said electromagnet coil 3, and is labeled as VP.
Dc pulse moving voltage SP has sample circuit 6 samplings, produces output signal INT/SA and send single-chip microcomputer.The open on the one hand rising edge (or trailing edge) of single chip circuit 8-1 interrupts; Resolve the INT signal and obtain electrical network cycle time (frequency), sampling SA signal 32 times (or 64 times) in one-period is used methods such as FFT on the other hand; Calculate " effective value " of corresponding line voltage; According to effective value, judgement was greater than 80% o'clock of nominal voltage, and single chip circuit 8-1 judges further whether VH has reached certain value (as greater than 240V) simultaneously.When these two conditions all satisfy; 1. single chip circuit 8-1 controls said relay 4 make contacts-2.; For said electromagnet coil 3 provides a high starting resistor; After the time-delay (100ms), single chip circuit 8-1 controls said switching circuit 7 and connects said electromagnet coil 3, and said electromagnet coil 3 has been realized strong startup.After strong startup is accomplished, continue time-delay (100ms), 1. single chip circuit 8-1 controls said relay 4 break contacts-and 2., VP keeps said electromagnet coil 3 certain moments.When effective value less than nominal voltage (being rated voltage) 50% the time; Single chip circuit 8-1 controls the electric current that said switching circuit 7 breaks off said electromagnet coil 3; Said electromagnet coil 3 inner back-moving springs eject armature, and armature backs down the circuit breaker self-locking mechanism, realizes the separating brake of circuit breaker.
Single chip circuit 8-1 comprises the auxiliary circuit of toggle switch, is needing the occasion of delayed releasing, and different toggle switch combinations is set, and after single-chip microcomputer reads this signal, confirms the delay time of delayed releasing.Like three binary-coded decimal toggle switchs, the representative time-delay is 0 second, 1 second, 2 seconds, 3 seconds, 4 seconds, 5 seconds, 10 seconds, 20 seconds respectively, or other time value.Wherein time-delay expression (not delaying time) " instantaneous disconnection " in 0 second, 10 stopwatches show when input voltage less than Ue 50% after, the disconnection again after 10 seconds of delaying time.
Embodiment 4
On the basis of embodiment 1-3, said main control module 8, its " effective value " method of resolving corresponding line voltage is; In one-period, with cycle time divided by 32, obtain the sampling time; (for example, mains frequency 50Hz, be 20ms cycle time; After full-wave rectification, be divided into 2 positive half waves, each positive half wave cycle is 10ms.10ms/32==0.3125ms=312us), by carrying out the pointwise sampling this blanking time, form 32 database.
Can further calculate " effective value " of concrete corresponding line voltage through following two methods:
Method one, employing fft algorithm (Fourier algorithm) with 32 point data bases " extraction " primary waves (first-harmonic), judge whether greater than 80% with first-harmonic; This algorithm is to anti-interference back complicated wave form, and especially the serious waveform that disturbs of antagonism is satisfactory for result.
Method two, employing effective value algorithm; Promptly
wherein ui be the maximum of input ac voltage, this maximum can compensate and obtains with crossing the sampled signal be input to said main control module 8; The not serious waveform (the THD total harmonic distortion is less than 15%) of high order harmonic component is done in this algorithm antagonism, and is satisfactory for result.
Embodiment 5
See Fig. 1-2, on the basis of embodiment 1-4, a kind of anti-humorous device for under-voltage releasing equipment method of work that involves full rate comprises:
1. after said device for under-voltage releasing equipment inserted the outer net electrical network, said main control module 8 detected and calculates the effective value and the said rectification circuit 1 output ripple dc voltage value of external power grid voltage through sample circuit 6;
2. the effective value when said external power grid voltage reaches 80% of described rated voltage Ue; When said pulsating dc voltage reaches the magnitude of voltage of said strong startup; Normally opened contact between the output that is connected in said rectification circuit 1 of said main control module 8 first control relays 4 and the current input terminal of electromagnet coil 3 is closed, control switching circuit 7 conductings that link to each other with the current output terminal of said electromagnet coil 3 again; So that said electromagnet coil 3 must be electric, i.e. armature adhesive;
Then, control said normally opened contact and break off, promptly only the voltage of keeping said armature adhesive is provided by said reduction voltage circuit 2;
3. when said external power grid voltage be lower than described rated voltage Ue 50% the time, the said switching circuit 7 of then said main control module 8 controls breaks off so that said electromagnet coil 3 dead electricity, promptly armature ejects.
Obviously, the foregoing description only be for clearly the present invention is described and is done for example, and be not to be qualification to execution mode of the present invention.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also make other multi-form variation or change.Here need not also can't give exhaustive to all execution modes.And these belong to conspicuous variation or the change that spirit of the present invention extended out and still are among protection scope of the present invention.
Claims (8)
1. device for under-voltage releasing equipment comprises: the rectification circuit that links to each other with external power grid (1), electromagnet coil (3), by the armature of said electromagnet coil (3) control;
It is characterized in that also comprising:
Reduction voltage circuit (2), its input links to each other with the positive output end of said rectification circuit (1), its output links to each other with the current input terminal of said electromagnet coil (3), is used to provide the voltage of keeping the armature adhesive;
Relay (4), one of which links to each other with the output of said rectification circuit (1) and the current input terminal of said electromagnet coil (3) respectively to normally opened contact;
Switching circuit (7), its current input terminal links to each other with the current output terminal of said electromagnet coil (3);
Sample circuit (6) is used to detect the magnitude of voltage of said rectification circuit (1) output ripple direct current;
Main control module (8) stores rated voltage Ue and the strong magnitude of voltage that starts, effective value and the said pulsating dc voltage value of output voltage to calculate external power grid voltage that is used to gather said sample circuit (6); When the voltage of said external power grid reaches 80% of rated voltage Ue; And when said pulsating dc voltage reached the magnitude of voltage of said strong startup, the said normally opened contact of control was closed earlier, the conducting of back control said switching circuit (7); After treating said armature adhesive, control said normally opened contact again and break off; When the voltage of said external power grid be lower than rated voltage Ue 50% the time, then control said switching circuit (7) and break off.
2. device for under-voltage releasing equipment according to claim 1; It is characterized in that: said main control module (8) also is used for: according to the rise of output voltage of gathering said sample circuit (6) along or trailing edge obtain the frequency or the cycle of said dispatch from foreign news agency netting twine voltage, to calculate said external power grid voltage effective value.
3. device for under-voltage releasing equipment according to claim 1 and 2 is characterized in that: establish an EMC power-supply filter at the input of said rectification circuit (1).
4. device for under-voltage releasing equipment according to claim 1 and 2 is characterized in that: establish the last one at said reduction voltage circuit (2) input and start electric capacity (C1).
5. device for under-voltage releasing equipment according to claim 1 is characterized in that: said sample circuit (6) comprising: frequency and cycle detection circuit (6-1), isolating diode (D1), pulsating dc voltage sample circuit; The output of said rectification circuit (1) links to each other with the anode of the input of said frequency and cycle detection circuit, said isolating diode (D1), and the negative electrode of said isolating diode (D1) links to each other with the input of said pulsating dc voltage sample circuit, reduction voltage circuit (2); The output of said frequency and cycle detection circuit, pulsating dc voltage sample circuit links to each other with said main control module (8).
6. device for under-voltage releasing equipment according to claim 1 is characterized in that: said main control module (6) is a single chip circuit, and it comprises: said switching circuit (2) the time-delay BCD toggle switch of opening time is controlled in the setting that is suitable for that links to each other with single-chip microcomputer.
7. device for under-voltage releasing equipment according to claim 1; It is characterized in that: said device for under-voltage releasing equipment also comprises; One diode (D2), the anode of said diode (D2) links to each other with the output of said reduction voltage circuit (2), and its negative electrode links to each other with said electromagnet coil (3) input.
8. the method for work of a device for under-voltage releasing equipment as claimed in claim 1 comprises:
1. after said device for under-voltage releasing equipment inserted the outer net electrical network, said main control module (8) detected and calculates the effective value and said rectification circuit (1) the output ripple dc voltage value of external power grid voltage through sample circuit (6);
2. the effective value when said external power grid voltage reaches 80% of described rated voltage Ue; When said pulsating dc voltage reaches the magnitude of voltage of said strong startup; Normally opened contact between the output that is connected in said rectification circuit (1) of the first control relay of said main control module (8) (4) and the current input terminal of electromagnet coil (3) is closed, switching circuit (7) conducting that links to each other with the current output terminal of said electromagnet coil (3) of control again; So that said electromagnet coil (3) must be electric, i.e. armature adhesive;
Then, control said normally opened contact and break off, promptly only the voltage of keeping said armature adhesive is provided by said reduction voltage circuit (2);
3. when said external power grid voltage be lower than described rated voltage Ue 50% the time, then said main control module (8) is controlled said switching circuit (7) and is broken off so that said electromagnet coil (3) dead electricity, promptly armature ejects.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410681242.1A CN104392869B (en) | 2012-07-02 | 2012-07-02 | Device for under-voltage releasing equipment |
| CN201410683218.1A CN104377644B (en) | 2012-07-02 | 2012-07-02 | A kind of device for under-voltage releasing equipment |
| CN201210225139.7A CN102768923B (en) | 2012-07-02 | 2012-07-02 | Undervoltage tripper and working method thereof |
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| CN201210225139.7A CN102768923B (en) | 2012-07-02 | 2012-07-02 | Undervoltage tripper and working method thereof |
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| CN201410681242.1A Division CN104392869B (en) | 2012-07-02 | 2012-07-02 | Device for under-voltage releasing equipment |
| CN201410683218.1A Division CN104377644B (en) | 2012-07-02 | 2012-07-02 | A kind of device for under-voltage releasing equipment |
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| CN102768923B CN102768923B (en) | 2014-12-17 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103346045A (en) * | 2013-06-18 | 2013-10-09 | 浙江南电电气有限公司 | Shunt release capable of being continuously energized |
| CN103531326A (en) * | 2013-10-15 | 2014-01-22 | 宁波华液机器制造有限公司 | Explosion-proof electromagnet and circuit control module thereof |
| CN108282113A (en) * | 2018-03-13 | 2018-07-13 | 厦门宏发电声股份有限公司 | A kind of electric motor starting banked relay device |
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| US20080067873A1 (en) * | 2006-09-15 | 2008-03-20 | Innocom Technology (Shenzhen) Co., Ltd. | Multiplexed DC voltage regulation output circuit having control circuit for stabilizing output voltages |
| CN101625944A (en) * | 2009-08-03 | 2010-01-13 | 江苏国星电器有限公司 | Permanent magnet releaser |
| CN101630831A (en) * | 2009-08-03 | 2010-01-20 | 江苏国星电器有限公司 | Electromagnetic undervoltage release |
| CN101725125A (en) * | 2009-11-24 | 2010-06-09 | 深圳市金一泰实业有限公司 | Ground sweeper |
| CN201877813U (en) * | 2010-11-23 | 2011-06-22 | 东莞基业电气设备有限公司 | Adjustable intelligent control device for leakage circuit breakers |
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2012
- 2012-07-02 CN CN201210225139.7A patent/CN102768923B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20080067873A1 (en) * | 2006-09-15 | 2008-03-20 | Innocom Technology (Shenzhen) Co., Ltd. | Multiplexed DC voltage regulation output circuit having control circuit for stabilizing output voltages |
| CN101625944A (en) * | 2009-08-03 | 2010-01-13 | 江苏国星电器有限公司 | Permanent magnet releaser |
| CN101630831A (en) * | 2009-08-03 | 2010-01-20 | 江苏国星电器有限公司 | Electromagnetic undervoltage release |
| CN101725125A (en) * | 2009-11-24 | 2010-06-09 | 深圳市金一泰实业有限公司 | Ground sweeper |
| CN201877813U (en) * | 2010-11-23 | 2011-06-22 | 东莞基业电气设备有限公司 | Adjustable intelligent control device for leakage circuit breakers |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103346045A (en) * | 2013-06-18 | 2013-10-09 | 浙江南电电气有限公司 | Shunt release capable of being continuously energized |
| CN103346045B (en) * | 2013-06-18 | 2015-09-16 | 浙江南电电气有限公司 | The shunt release of sustainable energising |
| CN103531326A (en) * | 2013-10-15 | 2014-01-22 | 宁波华液机器制造有限公司 | Explosion-proof electromagnet and circuit control module thereof |
| CN103531326B (en) * | 2013-10-15 | 2015-12-09 | 宁波华液机器制造有限公司 | A kind of flame proof electromagnet circuit control module and flame proof electromagnet |
| CN108282113A (en) * | 2018-03-13 | 2018-07-13 | 厦门宏发电声股份有限公司 | A kind of electric motor starting banked relay device |
| CN108282113B (en) * | 2018-03-13 | 2023-11-03 | 厦门宏发电声股份有限公司 | Motor starting combined relay device |
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| Publication number | Publication date |
|---|---|
| CN102768923B (en) | 2014-12-17 |
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