CN102856131B - A kind of device for under-voltage releasing equipment being applicable to three phase mains - Google Patents
A kind of device for under-voltage releasing equipment being applicable to three phase mains Download PDFInfo
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- CN102856131B CN102856131B CN201210224693.3A CN201210224693A CN102856131B CN 102856131 B CN102856131 B CN 102856131B CN 201210224693 A CN201210224693 A CN 201210224693A CN 102856131 B CN102856131 B CN 102856131B
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Abstract
The present invention relates to a kind of device for under-voltage releasing equipment being applicable to three phase mains, comprising: electromagnet coil, the armature controlled by described electromagnet coil; Rectification circuit, its input is connected with the arbitrary line voltage in three phase mains; Sample circuit, detects the output voltage of described rectification circuit; Line voltage detection module, is located at the output of described three phase mains, for detecting at least two group line voltages; Described electromagnet coil, its current input terminal is connected with the output of described rectification circuit, and its current output terminal is connected with a switching circuit; Main control module, stores rated voltage Ue, the strong magnitude of voltage started and the magnitude of voltage maintaining armature adhesive, if line voltage effective value meets 80% of rated voltage Ue control described switching circuit conducting with during the strong voltage started; If arbitrary line voltage lower than rated voltage Ue 50% time or described sampling voltage when being not equal to the magnitude of voltage of described maintenance armature adhesive, then control described switching circuit and disconnect.
Description
Technical field
The present invention relates to a kind of device for under-voltage releasing equipment being applicable to three phase mains.
Background technology
Device for under-voltage releasing equipment is circuit breaker, especially one of the critical elements of frame-type circuit breaker.Under-voltage release is when its terminal voltage is down to a certain prescribed limit, make a kind of release that circuit breaker has time delay or disconnects without time delay, when supply voltage declines (even slowly declining) in 70% to 35% scope of rated operational voltage, under-voltage release answers action (trip coil dead electricity, in coil, moving armature has back-moving spring to eject-thread off), under-voltage release is when supply voltage equals 35% of release rated operational 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 ensure that reliably closed (trip coil obtains electric circuit breaker, in coil, moving armature has coil electromagnetic force to overcome spring force to suck and keep certain moment-" adhesive ", providing condition for circuit breaker reliably closes a floodgate).The essence of undervoltage tripping, be prevent circuit breaker subordinate electric equipment be operated in electric current under under-voltage condition excessive after, the effective measures that electric equipment self-heating increases the weight of.
With reference to mentioned above principle, existing device for under-voltage releasing equipment, be single phase poaer supply working method mostly.The device for under-voltage releasing equipment of the integration in three-phase circuit, yet there are no comparatively ripe device for under-voltage releasing equipment scheme and product occurs.
Summary of the invention
The technical problem to be solved in the present invention is to provide the device for under-voltage releasing equipment that a kind of structure is simple, be applicable to three phase mains.
For solving the problems of the technologies described above, the invention provides a kind of device for under-voltage releasing equipment being applicable to three phase mains, comprising: electromagnet coil, the armature controlled by described electromagnet coil, rectification circuit, its input is connected with the arbitrary line voltage in three phase mains, sample circuit, detects the output voltage of described rectification circuit, line voltage detection module, is located at the output of described three phase mains, for detecting at least two group line voltages, switching circuit, its current input terminal is connected with the current output terminal of described electromagnet coil, the positive output end of described rectification circuit is connected with the current input terminal of described electromagnet coil, main control module, store rated voltage Ue, the magnitude of voltage of strong startup and the magnitude of voltage of maintenance armature adhesive, for gathering the output voltage of described each line voltage detection module to calculate each line voltage effective value of described three phase mains, the each line voltage effective value be suitable for when described three phase mains reaches 80% of rated voltage Ue simultaneously, and detect the sampling voltage of sample circuit when reaching the magnitude of voltage of described strong startup, control described switching circuit conducting, if arbitrary line voltage lower than rated voltage Ue 50% time or described sampling voltage when being not equal to the magnitude of voltage of described maintenance armature adhesive, then control described switching circuit to disconnect.
Described in judging in advance in the present invention, whether the output voltage (SA signal, SB signal) of at least two line voltage detection module meets adhesive condition, then judges whether the sampling voltage (SH signal) of described sample circuit reaches default (precharge) value.Only after three conditions meet, there is single chip circuit control switch circuit ON electromagnet coil simultaneously, ensure that absolutely adhesive.
Further, described main control module also for the frequency or the cycle that obtain described three-phase power line voltage according to the rising edge of output voltage or trailing edge that gather described each line voltage detection module, to calculate each line voltage effective value of described three phase mains; Its concrete thinking: first by magnitude of voltage and the cycle of the sampling of described main control module detection line voltage detection module road output, to obtain the voltage effective value of line accurately of outer net, can judge whether the effective value of outer net voltage reaches 80% of rated voltage Ue more accurately, so this release is also applicable to the occasion applying to different frequency very much, be particularly suitable for the alternating voltage that frequency is 20Hz ~ 65Hz.So second object of the present invention is to provide a kind of device for under-voltage releasing equipment being suitable for multi-frequency three phase mains.
Described main control module also for: when described line voltage is normal, if after above-mentioned sampling voltage fluctuates, after returning to the magnitude of voltage of described strong startup, described main control module produces one and controls described switching circuit conducting, to detect the pulse signal whether described electromagnet coil accesses, to realize when installing release, described electromagnet coil can warm swap, i.e. " hot plug "; Its operation principle: due to the impedance in switching circuit, when described electromagnet coil short circuit, the impedance of switching circuit limits short circuit current can not be excessive, fault can not be caused, the output voltage VH of the output of described rectification circuit is now the magnitude of voltage being less than the adhesive of described maintenance armature, then described main control module detection SH input goes out coil short, and switching circuit described in described master control module controls disconnects.When coil short removes (or extracting), VH voltage is elevated to input rated voltage
doubly (i.e. strong starting resistor), get ready for again starting electromagnet coil.Switching circuit described in described master control module controls performs once " the pulse conducting of short time ", and whether identification electromagnet coil accesses (insertion).Once identification electromagnet coil accesses, then wait for that VH is charged to input voltage value again
doubly, perform and start by force.Achieve " hot plug ".
Further, short circuit current during electromagnet coil short circuit described in order to more effective reduction, establishes a decompression capacitor CK at the input of described rectification circuit.
Further, in order to make described solenoid obtain high pressure, establish the last one start-up capacitance C1 at the output of described rectification circuit, charging voltage is the √ 2 times (being about the 3-5 of electromagnet coil rated operational voltage doubly) of input ac voltage.Moment connected by switching circuit, and on storage capacitor C1, electric charge is all discharged by solenoid, reaches the object of " starting by force " adhesive.
Further, in order to reduce the signal transacting of external power grid interference main control module, described line voltage detection module, comprising: the reduction voltage circuit be connected with line voltage, the photoelectrical coupler be connected with reduction voltage circuit output, the output of described photoelectric coupled circuit is connected with described main control module.
Further, described device for under-voltage releasing equipment also comprises: a power circuit providing described main control module, switching circuit and photoelectrical coupler power supply, the input voltage of this power circuit accesses from arbitrary phase line.
Further, in order to need the occasion of delayed releasing to use, described main control module is being a single chip circuit, and it comprises: the BCD toggle switch being suitable for the opening time of switching circuit time delay described in setup control be connected with single-chip microcomputer.
Be applicable to a method of work for the device for under-voltage releasing equipment of three phase mains, comprise:
1. when after described device for under-voltage releasing equipment access three phase mains, described main control module is detected by line voltage detection module and calculates the effective value of each line voltage of described three phase mains;
2. after described each line voltage reaches 80% of described rated voltage Ue simultaneously, described main control module carries out sample acquisitions to the input voltage of electromagnet coil, if when this input voltage reaches the magnitude of voltage of described strong startup, then the conducting of described master control module controls switching circuit is electric to make described electromagnet coil obtain, armature adhesive; Described input voltage drops to the magnitude of voltage of described maintenance armature adhesive, to maintain armature adhesive;
3. when arbitrary line voltage lower than described rated voltage Ue 50% time or described sampling voltage be not equal to described ME for maintenance value time, then described in described master control module controls switching circuit disconnect to make described electromagnet coil dead electricity, namely armature eject.
Further, in order to realize described " hot plug "; Judge to comprise the method whether described electromagnet coil 3 accesses:
A: when described line voltage is normal, if when described sampling voltage is not equal to the magnitude of voltage of described maintenance armature adhesive, then described master control module controls switching circuit disconnects;
B: when described sampling voltage returns to the magnitude of voltage of described strong startup, then described main control module produces one and controls described switching circuit conducting, to detect the pulse signal whether described electromagnet coil accesses;
C: when described sampling voltage declines, then judge that described electromagnet coil accesses, and when waiting for described sampling voltage to the magnitude of voltage of described strong startup, it is electric to make described electromagnet coil obtain that described main control module then controls described switching circuit conducting.
The present invention has the following advantages: the output voltage of (1) main control module gathering line voltage detection module and voltage cycle, and detect two groups of line voltages simultaneously, obtain each effective value of two groups of line voltages accurately, and judge whether input voltage reaches 80% of rated voltage by single-chip microcomputer, release is made to work in three phase mains by detecting strong starting resistor, solve the technical problem that existing device for under-voltage releasing equipment can not work etc. under three phase mains, and be well suited for working under the power supply of different frequency; (2) due to the access of decompression capacitor CK, the problem that when existing device for under-voltage releasing equipment normally works, coil heating amount is large is effectively overcome; By the strong start-up capacitance C1 of access, overcome staring torque little, often have not adhesive phenomenon and make circuit design simple; (3) utilize single-chip microcomputer and switching circuit with the use of, the warm swap of electromagnet coil can be realized, Short Circuit withstand, avoid electromagnet coil in installation process and pull out by mistake and cause release to burn; (4) adopt single-chip microcomputer to carry out under-voltage control, can power consumption be effectively reduced; (5) the line voltage detection module adopted, it realizes the collection of SA, SB signal by photoelectric coupling, and circuit is simple, and isolation effect is good.
Accompanying drawing explanation
In order to make content of the present invention be more likely to be clearly understood, below basis specific embodiment and by reference to the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is a kind of structure principle chart being applicable to the device for under-voltage releasing equipment of three phase mains of the present invention;
Fig. 2 is described line voltage detection module structural representation of the present invention;
Fig. 3 is the Voltammetric Relation curve chart of described photoelectrical coupler of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail:
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 define device for under-voltage releasing equipment.Under the requirement of this standard, exemplify following examples and be described.
Embodiment 1
See Fig. 1-Fig. 2, a kind of device for under-voltage releasing equipment being applicable to three phase mains, comprising: electromagnet coil 3, the armature controlled by described electromagnet coil 3; Rectification circuit 1, its input is connected with the arbitrary line voltage in three phase mains; Sample circuit 5, detects the output voltage of described rectification circuit 1; Line voltage detection module, is located at the output of described three phase mains, for detecting at least two group line voltages; Switching circuit 2, its current input terminal is connected with the current output terminal of described electromagnet coil 3; The positive output end of described rectification circuit 1 is connected with the current input terminal of described electromagnet coil 3;
Main control module 6, store rated voltage Ue, the magnitude of voltage of strong startup and the magnitude of voltage of maintenance armature adhesive, for gathering the output voltage of described each line voltage detection module to calculate each line voltage effective value of described three phase mains, the each line voltage effective value be suitable for when described three phase mains reaches 80% of rated voltage Ue simultaneously, and detect the sampling voltage of sample circuit 5 when reaching the magnitude of voltage of described strong startup, control the conducting of described switching circuit 2, if arbitrary line voltage lower than rated voltage Ue 50% time or described sampling voltage when being not equal to the magnitude of voltage of described maintenance armature adhesive, then control described switching circuit 2 to disconnect.
Described main control module 6 also for the frequency or the cycle that obtain described three-phase power line voltage according to the rising edge of output voltage or trailing edge that gather described each line voltage detection module, to calculate each line voltage effective value of described three phase mains.
Described main control module opens the rising edge or the trailing edge that interrupt exporting SA, SB signal with detection line voltage detection module road, to obtain cycle or the frequency of line voltage, and carry out with the magnitude of voltage of the sampling of line voltage detection module road output the voltage effective value of line accurately calculating to obtain outer net, can judge whether the effective value of outer net voltage reaches 80% of rated voltage Ue more accurately, so this release is also applicable to the occasion applying to different frequency very much, be particularly suitable for the alternating voltage that frequency is 20Hz ~ 65Hz.
Described main control module 6 can be single-chip microcomputer (MCU), SOC (system on a chip) (SOC), CPLD, FPGA or ARM and DSP.
Establish a decompression capacitor CK at the input of described rectification circuit 1, establish a decompression capacitor CK at the input of described rectification circuit 1.
After switching circuit is connected, described decompression capacitor CK plays the filter function of electric capacity, and the voltage on electromagnet coil is a lower voltage.Any high voltage is inputted, the amount of capacity of decompression capacitor CK can be calculated, meet the requirement of described electromagnet coil 3 low power run, and decompression capacitor does not produce active power, both achieved high-torque and started, make again the overall caloric value of device for under-voltage releasing equipment little.Circuit structure is the simplest.
Establish the last one start-up capacitance C1 at the output of described rectification circuit 1, in the present invention, by electric capacity CK, convert direct voltage to through bridge rectifier 1, charge to storage capacitor C1, charging voltage is input ac voltage
doubly (be about the 3-5 of described electromagnet coil 3 rated operational voltage doubly).Moment connected by switching circuit, and on storage capacitor C1, electric charge is all discharged by solenoid, reaches the object of " starting by force " adhesive.The power of strong startup, except C1 charging voltage, can also be optimized by the capacitance choosing C1 further.
Described line voltage detection module, comprising: the reduction voltage circuit 4-1 be connected with line voltage, and the output of the photoelectrical coupler 4-2 be connected with reduction voltage circuit output, described photoelectric coupled circuit 4-2 is connected with described main control module 6.
Described line voltage detection module, also can adopt: transformer pressure-reducing, rectification circuit, A/D convertor circuit and single-chip microcomputer are formed; Prior art also can realize this function simultaneously.
Described device for under-voltage releasing equipment also comprises: a power circuit 7 providing described main control module, switching circuit and photoelectrical coupler power supply, the input voltage of this power circuit 7 accesses from arbitrary phase line.
Described main control module 6 is a single chip circuit, and it comprises: the BCD toggle switch being suitable for the opening time of switching circuit 2 time delay described in setup control be connected with single-chip microcomputer.
Wherein said line voltage detection module comprises: connect the First Line voltage detection module 4a between any two line voltages and the second line voltage detection module 4b respectively.
In the present invention, be connected across A phase and be respectively SA, SB with the output signal of the First Line voltage detection module 4a of B phase and the second line voltage detection module 4b between B phase and C phase, represent the height of line voltage B and C.The height of any phase phase voltage, is all reacted to the height of line voltage, and also, SA and SB reflects the independent or staggered voltage levels of a phase wherein, two-phase, three-phase comprehensively.For described main control module 6 detects under-voltage, provide condition.When SA, SB or be less than 50% simultaneously Ue after, described main control module 6 controls described switching circuit 2 and disconnects described electromagnet coil 3.The constrained input end of detecting unit Uab, Ubc, isolation on electrically, therefore phase sequence can exchange arbitrarily.
Embodiment 2
See Fig. 1-Fig. 3, on the basis of embodiment 1, adopt single chip circuit for 380V voltage, described main control module 6, the execution mode of three-phase device for under-voltage releasing equipment major part is described.
A phase (as A phase) in power supply meets decompression capacitor CK, and the other end of CK receives described rectification circuit 1 one input, another input termination one phase (as B phase) of described rectification circuit 1.The anode of bridge rectifier is defined as VH, negativing ending grounding (GND).
After powering on, ac voltage rectifier is that pulsating direct current is charged to storage capacitor C1 by described rectification circuit 1, and charging voltage VH is √ 2 times (80% of the 380V of input ac voltage
approximate 430V).This charged electrical is pressed with the capacitance voltage sample circuit that R1 and R2 is composed in series, and production sampled signal SH sends into single-chip microcomputer.Charging voltage VH receives one end of described electromagnet coil 3 simultaneously.
Described SA and SB signal sends into single-chip microcomputer.
There is the voltage after D0 halfwave rectifier, be loaded into power circuit, the 15V(12V that power circuit produces) voltage provides power supply, the 5V(3.3V of production for switching circuit) voltage provides power supply for single chip circuit work, also can adjust the output voltage values of power supply as required.
Single chip circuit interrupts the output voltage SA from First Line voltage detection module (4a) by rising edge (or trailing edge), the output voltage SB of the second line voltage detection module (4b), obtain the grid cycle time (frequency), and SA several times of sampling in one-period, the methods such as application FFT, calculate " effective value " of corresponding grid line voltage, according to effective value, when judging to be greater than 80% of nominal voltage (rated voltage), described single chip circuit judges whether voltage VH reaches certain value simultaneously further, and preset value, as 430V.All reach certain value once SA, SB and SH, described electromagnet coil 3 connected by Single-chip Controlling switching circuit, achieves highly reliable strong startup.After described electromagnet coil 3 connected by switching circuit, the capacitor CK worked in ac circuit bears step-down task, for the described electromagnet coil 3 be operated in DC loop provides a suitable rated operational voltage (being such as 30V), now, C1 changes filter capacitor into.When any one signal in SA, SB is less than the Ue(of 50% as 190V) time, single chip circuit control switch circuit disconnects described electromagnet coil 3, realizes the separating brake of circuit breaker.
Single-chip microcomputer, while constantly detecting SA, SB, constantly detects the size of SH.When SH is greater than or less than certain value (i.e. the magnitude of voltage of described maintenance armature adhesive), think that described electromagnet coil 3 coil disconnects or short circuit, single-chip microcomputer is given an order cut-off switch circuit.In time afterwards, continue to judge the size of SH, until " three conditions " (i.e. SA, SB, SH voltage) satisfied after, the adhesive action of an execution 5ms, judges whether VH declines.If VH declines, then think that described electromagnet coil 3 coil accesses, after again waiting for that " three conditions " meets, perform " starting by force ".Achieve " hot plug ".
Single chip circuit comprises the auxiliary circuit of toggle switch, is needing the occasion of delayed releasing, arranges different toggle switch combinations, after single-chip microcomputer reads this signal, determines the delay time of delayed releasing.As three binary-coded decimal toggle switchs, represent time delay respectively 0 second, 1 second, 2 seconds, 3 seconds, 4 seconds, 5 seconds, 10 seconds, 20 seconds, or other time value.Wherein time delay in 0 second represents (not time delay) " instantaneous disconnection ", and 10 stopwatches show that, after input voltage is less than 50% of Ue, time delay disconnects after 10 seconds again.
In order to further illustrate the operation principle of phase-voltage measurement module, the execution mode of three-phase device for under-voltage releasing equipment key link is described.
Suppose that First Line voltage detection module 4a connects between A-B.Resistance R3 one end is connected to A phase, and the other end is connected to an input of the second rectifier bridge B2.Another input termination B phase of described second rectifier bridge B2.The anode of photoelectrical coupler 4-2 input described in the positive termination that described second rectifier bridge B2 exports, the negative terminal that described second rectifier bridge B2 exports connects the negative electrode of described photoelectrical coupler 4-2 input.The collector electrode of described photoelectrical coupler 4-2 output meets 5V, emitter connecting resistance R4, and is connected to single-chip microcomputer.The other end ground connection of R4.Described photoelectrical coupler 4-2 can be precision photoelectric coupler, if the transfer characteristics such as PC817 are the photoelectrical coupler of monotonic function.
The present invention re-detection " adhesive " and the magnitude of voltage of " discharging (dropout) " 2 points, by choosing the resistance value of suitable R3, R4, described photoelectrical coupler 4-2 can be made to keep linear, to meet the needs that voltage accurately detects, see Fig. 3.When supposing that input voltage is the Ue of 50%, output voltage SA is 1V, corresponding a point; When supposing that input voltage is the Ue of 80%, output voltage SA is 3.8V, corresponding b point.Then this simple isolation detection circuit, meets undervoltage tripping testing requirement completely.In addition, when the disconnected phase time of generation, output voltage SA is 0V, and single-chip microcomputer also easily can tell phase of whether breaking.
After power circuit is connected to halfwave rectifier D0 in the present invention, can significantly reduce power circuit oneself power consumption.
Embodiment 3
On the basis of embodiment 1-3, described main control module 8, its " effective value " method resolving corresponding line voltage is, sampled voltage SA, SB is obtained respectively by first, second line voltage detection module described, the open rising edge of described main control module or trailing edge interrupt, obtain the frequency that SA, SB signal is corresponding, thus obtain the cycle of line voltage, and in one-period, by cycle time divided by 32, obtain the sampling time, (such as, mains frequency 50Hz, cycle time is 20ms, after full-wave rectification, be divided into 2 positive half waves, each positive half wave cycle is 10ms.10ms/32==0.3125ms=312us), carry out pointwise sampling by this interval time, form the database of 32.
The output voltage values of concrete described rectification circuit 1 can be calculated further by following two methods:
Method one, employing fft algorithm (Fourier algorithm), with 32 point data bases " extraction " primary wave (first-harmonic), judge whether to be greater than 80% with first-harmonic; The method, to anti-interference rear complicated wave form, especially resists the satisfactory for result of the waveform of severe jamming.
Method two, employing
wherein ui is that described main control module 6 compensates the input line voltage instantaneous value obtained by described line voltage detection module; The waveform (THD total harmonic distortion is less than 15%) that the dry high order harmonic component of the method antagonism is not serious, satisfactory for result.
Embodiment 4
Be applicable to the method for work of the device for under-voltage releasing equipment of three phase mains described on the basis of embodiment 1, comprise:
1. when after described device for under-voltage releasing equipment access three phase mains, described main control module 6 is detected by line voltage detection module and calculates the effective value of each line voltage of described three phase mains;
2. after described each line voltage reaches 80% of described rated voltage Ue simultaneously, the input voltage of described main control module 6 pairs of electromagnet coils 3 carries out sample acquisitions, if when this input voltage reaches the magnitude of voltage of described strong startup, then the conducting of described main control module 6 control switch circuit 2 obtains electric to make described electromagnet coil 3, armature adhesive; Described input voltage drops to the magnitude of voltage of described maintenance armature adhesive, to maintain armature adhesive;
If 3. arbitrary line voltage lower than described rated voltage Ue 50% time or described sampling voltage when being not equal to described ME for maintenance value, then described main control module 6 controls described switching circuit 2 and disconnects making described electromagnet coil 3 dead electricity, and namely armature ejects.
In order to realize " hot plug ", namely judge to comprise the method whether described electromagnet coil 3 accesses:
A: when described line voltage is normal, if when described sampling voltage is not equal to the magnitude of voltage of described maintenance armature adhesive, then described main control module 6 control switch circuit 2 disconnects;
B: if described sampling voltage returns to the magnitude of voltage of described strong startup, then described main control module 6 produces the conducting of a control described switching circuit 2, to detect the pulse signal whether described electromagnet coil 3 accesses;
C: if described sampling voltage declines, then judge that described electromagnet coil 3 accesses, when waiting for described sampling voltage to the magnitude of voltage of described strong startup, described main control module 6 controls the conducting of described switching circuit 2 to make described electromagnet coil 3 must be electric.
Obviously, above-described embodiment is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all execution modes.And these belong to spirit institute's apparent change of extending out of the present invention or change and are still among protection scope of the present invention.
Claims (9)
1. be applicable to a device for under-voltage releasing equipment for three phase mains, comprise: electromagnet coil (3), the armature controlled by described electromagnet coil (3);
Characterized by further comprising:
Rectification circuit (1), its input is connected with the arbitrary line voltage in three phase mains;
Sample circuit (5), detects the output voltage of described rectification circuit (1);
Line voltage detection module, is located at the output of described three phase mains, for detecting at least two group line voltages;
Switching circuit (2), its current input terminal is connected with the current output terminal of described electromagnet coil (3);
Described rectification circuit (1) positive output end is connected with the current input terminal of described electromagnet coil (3);
Main control module (6), store rated voltage Ue, the magnitude of voltage of strong startup and the magnitude of voltage of maintenance armature adhesive, for gathering the output voltage of described each line voltage detection module to calculate each line voltage effective value of described three phase mains, the each line voltage effective value be suitable for when described three phase mains reaches 80% of rated voltage Ue simultaneously, and the sampling voltage detecting sample circuit (5) is when reaching the magnitude of voltage of described strong startup, control described switching circuit (2) conducting, if arbitrary line voltage lower than rated voltage Ue 50% time or described sampling voltage when being not equal to the magnitude of voltage of described maintenance armature adhesive, then control described switching circuit (2) to disconnect.
2. device for under-voltage releasing equipment according to claim 1, it is characterized in that: described main control module (6) also for the frequency or the cycle that obtain described three-phase mains voltage according to the rising edge of output voltage or trailing edge that gather described each line voltage detection module, to calculate each line voltage effective value of described three phase mains.
3. device for under-voltage releasing equipment according to claim 1 and 2, is characterized in that: establish a decompression capacitor (CK) at the input of described rectification circuit (1).
4. device for under-voltage releasing equipment according to claim 1 and 2, is characterized in that: establish the last one start-up capacitance (C1) at the output of described rectification circuit (1).
5. device for under-voltage releasing equipment according to claim 4, it is characterized in that: described line voltage detection module, comprise: the reduction voltage circuit (4-1) be connected with line voltage, the photoelectrical coupler (4-2) be connected with reduction voltage circuit output, the output of described photoelectrical coupler (4-2) is connected with described main control module (6).
6. device for under-voltage releasing equipment according to claim 1, it is characterized in that: described device for under-voltage releasing equipment also comprises: a power circuit (7) providing described main control module, switching circuit and photoelectrical coupler power supply, the input voltage of this power circuit (7) accesses from arbitrary phase line.
7. device for under-voltage releasing equipment according to claim 1, is characterized in that: described main control module (6) is a single chip circuit, and it comprises: the BCD toggle switch being suitable for switching circuit described in setup control (2) time delay opening time be connected with single-chip microcomputer.
8. a method of work for device for under-voltage releasing equipment as claimed in claim 1, comprising:
1. when after described device for under-voltage releasing equipment access three phase mains, described main control module (6) is detected by line voltage detection module and calculates the effective value of each line voltage of described three phase mains;
2. after described each line voltage reaches 80% of described rated voltage Ue simultaneously, the input voltage of described main control module (6) to electromagnet coil (3) carries out sample acquisitions, if when this input voltage reaches the magnitude of voltage of described strong startup, then described main control module (6) control described switching circuit (2) conducting with make described electromagnet coil (3) electric, armature adhesive; Described input voltage drops to the magnitude of voltage of described maintenance armature adhesive, to maintain armature adhesive;
3. when arbitrary line voltage lower than described rated voltage Ue 50% time or described sampling voltage be not equal to described ME for maintenance value time, then described main control module (6) controls described switching circuit (2) disconnection to make described electromagnet coil (3) dead electricity, and namely armature ejects.
9. the method for work of device for under-voltage releasing equipment according to claim 8, also comprises: judge to comprise the method that described electromagnet coil (3) accesses:
A: when described line voltage is normal, if when described sampling voltage is not equal to the magnitude of voltage of described maintenance armature adhesive, then described main control module (6) control switch circuit (2) disconnects;
B: when described sampling voltage returns to the magnitude of voltage of described strong startup, then described main control module (6) produces one and controls described switching circuit (2) conducting, to detect the pulse signal whether described electromagnet coil (3) accesses;
C: when described sampling voltage declines, then judge that described electromagnet coil (3) accesses, when waiting for described sampling voltage to the magnitude of voltage of described strong startup, described main control module (6) then control described switching circuit (2) conducting with make described electromagnet coil (3) electric.
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| CN201210224693.3A CN102856131B (en) | 2012-07-02 | 2012-07-02 | A kind of device for under-voltage releasing equipment being applicable to three phase mains |
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| CN201210224693.3A CN102856131B (en) | 2012-07-02 | 2012-07-02 | A kind of device for under-voltage releasing equipment being applicable to three phase mains |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101614795A (en) * | 2009-07-21 | 2009-12-30 | 北京中纺锐力机电有限公司 | A kind of default-phase signal detection circuit for three-phase power |
| CN101630831A (en) * | 2009-08-03 | 2010-01-20 | 江苏国星电器有限公司 | Electromagnetic undervoltage release |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI335715B (en) * | 2006-09-15 | 2011-01-01 | Chimei Innolux Corp | Multiplexed dc voltage regulation output circuit |
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2012
- 2012-07-02 CN CN201210224693.3A patent/CN102856131B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101614795A (en) * | 2009-07-21 | 2009-12-30 | 北京中纺锐力机电有限公司 | A kind of default-phase signal detection circuit for three-phase power |
| CN101630831A (en) * | 2009-08-03 | 2010-01-20 | 江苏国星电器有限公司 | Electromagnetic undervoltage release |
Non-Patent Citations (1)
| Title |
|---|
| 基于ATtiny单片机的永磁型欠压脱扣器的设计;吴志祥;《工矿自动化》;20081231(第6期);第119-121页 * |
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| CN102856131A (en) | 2013-01-02 |
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