CN202888081U - AC contactor intelligent control apparatus with energy saving effect - Google Patents
AC contactor intelligent control apparatus with energy saving effect Download PDFInfo
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- CN202888081U CN202888081U CN201220427389.4U CN201220427389U CN202888081U CN 202888081 U CN202888081 U CN 202888081U CN 201220427389 U CN201220427389 U CN 201220427389U CN 202888081 U CN202888081 U CN 202888081U
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Abstract
The utility model discloses an AC contactor intelligent control apparatus with an energy saving effect and the intelligent control apparatus comprises a measurement control system, a high-frequency switch ACDC power supply and an AC contactor drive circuit, wherein the AC contactor drive circuit comprises a first drive control circuit, a second drive control circuit, a low-voltage DC stabilized-voltage power supply and an AC power supply. The first drive control circuit, the low-voltage DC stabilized-voltage power supply and a control coil of the AC contactor are connected in series to form a DC loop. The second drive control circuit, the AC power supply and a control coil of the AC contactor are connected in series to form an AC loop. Control ends of the first drive control circuit and the second drive control circuit are respectively connected with a control output terminal of the measurement control system. The apparatus provided by the utility model uses AC to attract and uses the low-voltage stabilized-voltage DC power supply to keep an attracted state, so that control coil loss can be effectively reduced, cost is low, and the apparatus has a significant energy-saving effect, and good stability and security.
Description
Technical field
The utility model relates to the A.C. contactor intelligence controlling device of a kind of A.C. contactor intelligence controlling device, particularly a kind of tool energy-conserving action.
Background technology
A.C. contactor is a kind of remote electrical equipment that exchanges main circuit and large volume controlled circuit with disjunction of connecting continually that is applicable to, used in large quantities at industrial automation, be mainly used in controlling the application such as motor, electroheat equipment, electric welding machine, power-supply system interchange input.The supply power voltage of a lot of alternating current equipments has the scope of a regulation, should control the A.C. contactor disjunction to cut off the power supply of equipment when the power failures such as the AC power generation overvoltage of giving power devices, under-voltage, phase shortage, and protection equipment is unlikely to damage; Some equipment is in order to guarantee power supply reliability, to switch for load equipment provides double loop power supply and carries out duplicate supply with A.C. contactor, when above-mentioned overvoltage, under-voltage, phase shortage, Loss of power failure appear in the power supply of powering, can connect again by the A.C. contactor of this road power supply of control disjunction the A.C. contactor of another road normal power source, normal to guarantee to the load equipment power supply.In above-mentioned two application, the connection of A.C. contactor and disjunction all must be finished automatically by special A.C. contactor intelligence controlling device.A.C. contactor intelligence controlling device (hereinafter to be referred as control device) detects the input voltage of main noddle on contactor in real time, send out control command corresponding when finding above-mentioned power failure, for immediately the drive circuit of A.C. contactor, control A.C. contactor disjunction or connection, and carry out corresponding information alarm or indication.
A.C. contactor mainly contains four parts and forms: (1) electromagnetic system comprises control coil, moving iron core and static iron core; (2) contact system comprises that three groups of main contacts and one to two group are often opened, normally closed auxiliary contact, the mutually interlock that connects together of it and moving iron core; (3) arc-control device, the general larger A.C. contactor of capacity all is provided with arc-control device, so that rapid breaking arc avoids burning out main contact; (4) insulation crust and annex, various springs, transmission mechanism, short-circuited conducting sleeve, binding post etc.
The operation principle of A.C. contactor: when control coil was switched on, static iron core produced electromagnetic attraction, will move the iron core adhesive, because contact system links with moving iron core, therefore moving iron core drives three movable contact springs and moves simultaneously the closing of contact, thereby plugged.When coil blackout, suction disappears, and moving iron core interlock part relies on the reaction force of spring and separates, and main contact is disconnected, and cuts off the electricity supply.Control coil has a rated voltage Un, Un is generally: 220Vac or 380Vac, the scope of GB GB14048.4-93 regulation A.C. contactor pick-up voltage is 85% ~ 110%Un, is lower than the reliably adhesive or affect other performance index of contactor of this scope contactor; The power consumption that is higher than this scope control coil will increase, and make easily coil temperature rise too high and burn coil.
The control method of A.C. contactor routine: when needing adhesive, the alternating voltage that applies prescribed limit to control coil makes it adhesive and continues to apply this voltage and keep attracting state; When needing disjunction, the power supply of cutting-off controlling coil gets final product.Existing A.C. contactor intelligence controlling device all is to adopt the control method of this routine to control A.C. contactor, and there are the following problems for this control mode:
1) power consumption is large.A.C. contactor is widely used in the low-voltage circuit, is a kind of industrial necessity convenient, that amount is large and wide that uses safely, controls.The rated current that China generally uses now should be in more than one hundred million at 63A and above big or middle Capacity AC Contactor, and the active power that its operation electromagnetic system consumes when sticking is between 10W～100W; The reactive power that consumes is then between tens of weary your extremely hundreds of weary thats.Consume active power distribution be roughly: iron core 65% ~ 75%, short-circuited conducting sleeve 25% ~ 30%, coil 3% ~ 5%.Use big country for the such A.C. contactor that is in industrialization, urbanization process quickening of China, and be becoming tight energy demand day, the conservation of power resource has become the task of top priority.
2) control coil heating is large, and the control coil of contactor is burnt in temperature rise easily.Operation principle according to A.C. contactor, when using alternating voltage control, what control coil flow through is alternating current, in the iron core of A.C. contactor, produce alternating magnetic field, alternating magnetic field will produce magnetic hysteresis loss and eddy current loss in the annex short-circuited conducting sleeve of iron core and A.C. contactor, the general designation magnetic loss, magnetic loss accounts for more than 90% of A.C. contactor sticking state loss, and remaining part loss is that coil current hinders the loss that has a resistance at the copper of control coil.The heat that the control coil loss produces often makes contactor coil burn out, thus the life-span of the A.C. contactor that is through with.
3) scope of using is subjected to limiting voltage.The loss of control coil with put on the square proportional of voltage on the coil, and domestic voltage ripple of power network scope is wider, normal allowable fluctuation range is ± 15%, but some place often can reach ± 20% fluctuation.The long-term higher place of voltage because the control coil loss of A.C. contactor exceeds standard for a long time, therefore is easy to damage, and this situation should not be used A.C. contactor.
4) the contact vibration occurs easily.The sticking of A.C. contactor realizes by coil electricity, and sticking strength is relevant with electric current, magnetic gap, when voltage when closing a floodgate with the fluctuation of separating brake critical condition, contactor is in and seemingly closes like a minute state, just chatter constantly causes contact melting welding or burns, and the motor even load is burnt out.
5) larger noise is arranged.It is to make silicon steel sheet generation electromagnetic force by coil electricity that A.C. contactor close a floodgate to keep, and makes the adhesive of sound silicon steel sheet, when line voltage deficiency or sound silicon steel sheet surface irregularity or when dust, foreign matter etc. are arranged, just has noise producing.
6) the electric problem of rolling is arranged.The electric problem of so-called rolling refers to A.C. contactor because the disconnection that the fluctuation of line voltage (rolling electricity) occurs beating of adhesive again, and this phenomenon also can make the motor of A.C. contactor control produce the phenomenon of beating or restarting, thereby affects the stability of production system.
It more than is the problem of using conventional method control A.C. contactor to exist.The permanent-magnetic AC contact that utilizes permanent magnet mechanism to control appearred in these several years in order to address these problems, this contactor is to utilize permanent magnetic rather than electromagnetic force to keep the attracting state of contactor, therefore control coil consumed power and play energy-conserving action has not also well solved simultaneously the other problem of above-mentioned proposition when keeping adhesive.China's electricity-saving type A.C. contactor has had certain market at present, but universal not enough, and traditional A.C. contactor uses the user at present and occupies an leading position.Main cause is that the power-saving contactor price is more expensive, and the user can't accept on disposable input, is still waiting country and widelys popularize.
Except addressing the above problem with permanent-magnetic AC contact, also have some to solve the problems referred to above by the control method that changes traditional A.C. contactor, the thought of this energy-saving control method is: with the adhesive of high voltage direct current pressure-controlled A.C. contactor and then keep the attracting state of contactor with the stationary magnetic field that the direct current that low-voltage dc voltage produces forms, the iron core of contactor is not in alternating magnetic field and just can produce magnetic loss when keeping attracting state like this, thereby reaches energy-conservation and reduce the purpose of coil heating.But this method has a defective: when applying high-voltage dc voltage to control coil and make the contactor adhesive, the time that high-voltage dc voltage applies is not easy control, and reliability is relatively poor.Because when control coil applies high-voltage dc voltage, iron core is in unidirectional excited state, the overlong time that high-voltage dc voltage applies will cause core sataration, and control coil is equivalent to a wire with the high-voltage DC power supply short circuit behind the core sataration, and control coil is easy to be burnt.At present this class technology all is the semi-conductor electricity electronic circuit in addition, and circuit structure relatively complexity and circuit does not carry out with electrical network that electrical isolation is struck by lightning easily and surge voltage.
Summary of the invention
For addressing the above problem, the purpose of this utility model is to provide a kind of A.C. contactor intelligence controlling device that can reduce effectively that control coil loss, stability and fail safe are good, cost is low and have remarkable energy-conserving action.
The technical scheme that the invention for solving the technical problem adopts is:
A kind of A.C. contactor intelligence controlling device of tool energy-conserving action, comprise the Measurement and Control System take micro-control unit as core, HF switch ACDC power supply and driving circuit of AC contactor, the sampling input of described Measurement and Control System is connected to the three-phase alternating current electrical input of A.C. contactor, the control output end of Measurement and Control System is connected with the driving control end of driving circuit of AC contactor, the drive output of driving circuit of AC contactor is connected to the control coil of A.C. contactor, HF switch ACDC power supply links to each other with driving circuit of AC contactor with Measurement and Control System respectively provides operating voltage, described driving circuit of AC contactor comprises the first Drive and Control Circuit with switch control action, the second Drive and Control Circuit, the low-voltage DC voltage-stabilizing power supply that is provided by HF switch ACDC power supply also is provided, power taking consists of from three-phase alternating current AC power and resettable fuse, described the first Drive and Control Circuit, the control coil series connection of low-voltage DC voltage-stabilizing power supply and A.C. contactor consists of DC loop, described the second Drive and Control Circuit, resettable fuse, AC power, the control coil series connection of low-voltage DC voltage-stabilizing power supply and A.C. contactor consists of ac circuit, and the control end of described the first Drive and Control Circuit and the second Drive and Control Circuit is connected to respectively the control output end of Measurement and Control System.
Further, described AC power, low-voltage DC voltage-stabilizing power supply, A.C. contactor control coil, resettable fuse and the second Drive and Control Circuit are connected in series successively and consist of the loop.This design can effectively be simplified circuit and save circuit cost.
Further, described the first Drive and Control Circuit comprises the first relay and is used for the first relay drive circuit of control the first relay, described the second Drive and Control Circuit comprises the second relay and is used for the second relay drive circuit of control the second relay that wherein the driving control end of the first relay and the second relay is connected to respectively the control output end of Measurement and Control System by the first relay drive circuit and the second relay drive circuit.
Further, described the first relay is the hilted broadsword relay, and its relay switch is arranged on the DC loop; Described the second relay is two keys relay, and described two keys relay comprises two group relay switches, and described two group relay switches are arranged in the ac circuit respectively, and two group relay switches are arranged at respectively on the connection line at AC power the two poles of the earth.
Further, described the first relay drive circuit is the switching circuit that is comprised of the first switch triode, the emitter and collector of described the first switch triode connect respectively with the first relay; Described the second relay drive circuit is the switching circuit that is comprised of the second switch triode, the emitter and collector of described second switch triode connect respectively with the second relay, the base stage of above-mentioned the first switch triode and second switch triode is connected to respectively the control output end of Measurement and Control System.
Further, a wherein utmost point of AC power and the connection line of A.C. contactor control coil are provided with resettable fuse; Described A.C. contactor control coil is parallel with piezo-resistance.
The energy saving driving circuit of the utility model contactor control coil simple in structure, element is few, and control logic is clear, therefore has higher reliability and stability.And the utility model is to improve perfect on the basis of existing A.C. contactor intelligence controlling device, the number of elements that increases is few, therefore only need to increase few cost at control device and just can solve a plurality of problems that propose previously, the cost of in fact whole control system is lower than other solutions.
Further, described Measurement and Control System comprises three-phase voltage isolation sample circuit, signal conditioning circuit and the micro-control unit that in succession connects successively, and the control output end of described micro-control unit is connected to driving circuit of AC contactor; Three-phase voltage isolation sample circuit is connected to the three-phase alternating current electrical input of A.C. contactor.Three-phase voltage isolation sample circuit is sampled to three-phase alternating current, and after amplifying on demand by signal conditioning circuit, collection signal is transferred to micro-control unit, and micro-control unit sends the control signal of adhesive or the disjunction of A.C. contactor to driving circuit of AC contactor according to the signal that collects.
Further, described micro-control unit is single-chip microcomputer.
Further, described Measurement and Control System also comprises for being connected with micro-control unit with communication interface circuit, described communication interface circuit that computer communicates.Communicate by letter with PC by communication interface circuit, logical PC carries out the setting of relevant parameter or realizes the functions such as remote measurement, remote signalling, remote control.Control device can carry out remote control, remote measurement, remote signalling to A.C. contactor, makes the operation of A.C. contactor also enter digitlization, informationization, visual, intelligentized epoch.
Further, described Measurement and Control System comprises that also described opening into leaving interface circuit is connected with micro-control unit for realizing the opening into leaving interface circuit of remote signalling, distant control function.Utilization is opened into leaving interface circuit can realize remote signalling, distant control function.
Further, described Measurement and Control System also comprises the LED light circuit that is used to indicate A.C. contactor position and communications status, and described LED light circuit is connected with micro-control unit.Utilize the information such as location status, the communications status of LED light circuit indication A.C. contactor, the alarm indication of being correlated with.
Further, described Measurement and Control System comprises that also be used to the key switch circuit that control model is set, described key switch circuit is connected with micro-control unit.Utilize button and switch that automatic/hand mode control contactor can be set, manually which contactor adhesive adhesive and disjunction contactor can also select for the control device that is used for the duplicate supply switching under manual control mode.Parameter and the function choosing-item of controller can be set, make controller can automatically finish alarm, the defencive functions such as input power overvoltage, under-voltage, phase shortage, improve the intelligent level of A.C. contactor operation.
The beneficial effects of the utility model are: the A.C. contactor intelligence controlling device of a kind of tool energy-conserving action that the utility model adopts, by by the first Drive and Control Circuit in the driving circuit of AC contactor, the series connection of the control coil of low-voltage DC voltage-stabilizing power supply and A.C. contactor consists of DC loop and by the second Drive and Control Circuit, the control coil series connection of AC power and A.C. contactor consists of ac circuit and respectively the control coil of A.C. contactor is controlled, be implemented in the control method of on the basis of existing A.C. contactor control device control device being controlled A.C. contactor by routine change the novel energy-saving control circuit that then keeps attracting state with the alternating current adhesive with the low pressure constant voltage dc source into the alternating current adhesive and with the method that alternating current is kept attracting state, the utility model compared with prior art has following beneficial effect:
1, of the present utility model have energy-conserving action, and energy-saving efficiency surpasses 90%.Conventional control mode is when the sticking state, use alternating voltage to keep adhesive because be, the alternating current that control coil flows through produces alternating magnetic field in iron core, to in the annex short-circuited conducting sleeve of iron core and A.C. contactor, produce magnetic hysteresis loss and eddy current loss general designation magnetic loss, magnetic loss accounts for more than 90% of A.C. contactor sticking state loss, and remaining loss is the resistive loss that the copper resistance of control coil produces.The utility model is kept the sticking state of A.C. contactor with the low pressure direct current of voltage regulation, therefore do not exist alternating magnetic field just not to have magnetic loss yet, control coil only has resistive loss, be lower than conventional control mode 10%, for the larger A.C. contactor of capacity even only have 2% of usual manner, has significant energy-saving effect.
2, the loss of control coil significantly reduces, and it is very little to generate heat, and temperature rise can be ignored substantially, can avoid the problem that control coil burns because of excess Temperature occurs, and effectively prolong the life-span of A.C. contactor.
3, because keep the adhesive of A.C. contactor with the low pressure direct current of voltage regulation, the voltage stabilization of control coil is not subjected to the impact of voltage ripple of power network, does not therefore exist because of coil voltage to cross the low problem that produces noise and contact vibration.
4, widen the scope that A.C. contactor uses.Because keep the adhesive of A.C. contactor with the low pressure direct current of voltage regulation, the voltage stabilization of control coil is not subjected to the impact of voltage ripple of power network, the problem of not worrying that line voltage is too high and burning control coil, A.C. contactor can use in wider voltage ripple of power network scope.
5, can prevent from shaking the generation of electric problem, because keep the adhesive of A.C. contactor with the low pressure direct current of voltage regulation, low-voltage DC is taken from HF switch ACDC power supply, the output of DC power supply can be placed larger storage capacitor, when voltage ripple of power network, but the A.C. contactor of keeping of the energy short time of the storage of storage capacitor keeps attracting state, thereby has prevented the electric problem of rolling.
6, can not occur to cause that because the pick-up voltage application time is long the control coil core sataration burns the fault of coil that therefore safer, more reliable, control logic is also simpler.
7, A.C. contactor is in sticking state timed unit and line voltage is isolated fully, and the ability that this can improve the anti-electromagnetic interference of control device helps to improve stability and the reliability of control device.
8, can be used for easily transforming the A.C. contactor control device that is moving.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing and example.
Fig. 1 is integrated circuit theory diagram of the present utility model.
Fig. 2 is the circuit theory diagrams of driving circuit of AC contactor in the prior art.
Fig. 3 is the circuit theory diagrams of the utility model driving circuit of AC contactor.
Fig. 4 is the circuit theory diagrams that the utility model is applied to the duplicate supply switching controls.
Embodiment
With reference to shown in Figure 1, the A.C. contactor intelligence controlling device of a kind of tool energy-conserving action of the present utility model, by the Measurement and Control System 1 take micro-control unit as core, driving circuit of AC contactor 2, HF switch ACDC power supply 3 forms, and wherein the utility model A.C. contactor intelligence controlling device is used for control A.C. contactor 4.
The small-power high-frequency switch DC power that described HF switch ACDC power supply 3 is Multiple isolated outputs.
The sampling input of wherein said Measurement and Control System 1 is connected to the three-phase alternating current electrical input of A.C. contactor 4, the control output end of Measurement and Control System 1 is connected with the driving control end of driving circuit of AC contactor 2, and the drive output of driving circuit of AC contactor 2 is connected to the control coil of A.C. contactor 4.
Described driving circuit of AC contactor 2 is core of the present utility model, and it drives adhesive or the disconnection of A.C. contactor 4 according to the input control signal of Measurement and Control System 1.
Measurement and Control System 1 by micro-control unit 11, signal conditioning circuit 12, three-phase voltage isolation sample circuit 13, open into leaving interface circuit 14, photoelectricity isolated communication interface circuit 15, LED light circuit 16, key switch circuit 17 and form.Wherein said three-phase voltage isolation sample circuit 13, signal conditioning circuit 12 are connected with micro-control unit and are in succession connected successively, described photoelectricity isolated communication interface circuit 15, open into leaving interface circuit 14, LED light circuit 16, key switch circuit 17 and are connected with micro-control unit 11 respectively.The control output end of described micro-control unit 11 is connected to driving circuit of AC contactor 2.
The major function of Measurement and Control System 1 is the three-phase input voltage that gathers A.C. contactor 4, and analyzes the signal that collects and send the control signal of adhesive or the disjunction of A.C. contactor to driving circuit of AC contactor 2 according to default condition micro-control unit 11; Communicate by letter with PC by communication interface circuit, carry out the setting of relevant parameter or realize the functions such as remote measurement, remote signalling, remote control by PC; Utilization is opened into leaving interface circuit 14 and is realized remote signalling, distant control function; Utilize the information such as location status, the communications status of LED light circuit 16 indication A.C. contactors, the alarm indication of being correlated with; Utilize key switch circuit 17 that automatic/hand mode control contactor can be set, manually which contactor adhesive adhesive and disjunction contactor can also select for the control device that is used for the duplicate supply switching under manual control mode.
Three-phase alternating current is delivered to the input of A.C. contactor 4, also deliver to simultaneously the three-phase voltage isolation sample circuit 13 in the Measurement and Control System 1, (but the input of HF switch ACDC power supply 3 is also got in other place as the input of HF switch ACDC power supply 3 to get in addition two-phase from three-phase alternating current, also desirable single-phase electricity), deliver to HF switch ACDC power supply 3 in this road AC-input voltage also deliver to simultaneously driving circuit of AC contactor 2 as the Vac1 in the driving circuit of AC contactor 2, HF switch ACDC power supply 3 outputs four road low-voltage dc power supplies are respectively positive supply Vdd, Vdd1, Vdd2, negative supply Vss, GND, GND1, GND2 is respectively their ground, Vdd and Vss be GND ground altogether, wherein, Vdd, Vss is Measurement and Control System 1 power supply, Vdd also is first in the driving circuit of AC contactor 2, the power supply of the second Drive and Control Circuit, Vdd1 delivers stream contactor drive circuit 2 as the low pressure constant voltage dc source of keeping the contactor attracting state in 2, and Vdd2 is 15 power supplies of photoelectricity isolated communication interface circuit.The contactor control signal of micro-control unit 11 outputs is delivered in the driving circuit of AC contactor 2, and the output of driving circuit of AC contactor 2 is received the control coil two ends of A.C. contactor.
With reference to shown in Figure 2, the driving circuit of AC contactor for existing A.C. contactor intelligence controlling device is comprised of resistance R 1, R2, relay J D1, diode D1, triode Q1, piezo-resistance RV1.Vdd is one tunnel output of HF switch ACDC power supply 3, the working power of the output of this road and single chip computer measurement control system 1 altogether, GND is exactly the ground of this road power supply.Vac1 gets the AC power of two-phase formation for the control coil that drives A.C. contactor from three-phase alternating current.Deliver to the drive circuit of the relay J D1 that is consisted of by Q1 and R1, R2 through R1 from the relay control signal drv of micro-control unit 11, JD1 is a two keys relay, when transferring high level from the relay control signal of micro-control unit 11 to by low level, the Q1 conducting makes the JD1 adhesive, two groups of normally opened contacts of JD1 are connected the control coil of Vac1 and A.C. contactor JK1, and JK1 gets electric adhesive; When the relay control signal of micro-control unit 11 transferred low level to, the Q1 cut-off disconnected JD1, the control coil of Vac1 and A.C. contactor JK1 is cut off the disjunction of JK1 dead electricity.D1 is used for the afterflow of the coil of JD1, and VR1 is used for absorbing the peak voltage that produces when JK1 disconnects.This scheme adopts as can be seen from the above is conventional with the alternating current adhesive and keep the method driving A.C. contactor of attracting state with alternating current.
With reference to shown in Figure 3, the first embodiment for driving circuit of AC contactor 2 of the present utility model, described driving circuit of AC contactor 2 comprises the first Drive and Control Circuit 21 with switch control action, the second Drive and Control Circuit 22, the low-voltage DC voltage-stabilizing power supply Vdc1 that is provided by HF switch ACDC power supply 3 also is provided, power taking consists of from three-phase alternating current AC power Vac1 and resettable fuse PTC1, described the first Drive and Control Circuit 21, the control coil series connection of low-voltage DC voltage-stabilizing power supply Vdc1 and A.C. contactor 4 consists of DC loop, described AC power Vac1, low-voltage DC voltage-stabilizing power supply Vdc1, A.C. contactor 4 control coils, resettable fuse PTC1 and the second Drive and Control Circuit 22 are connected in series the formation ac circuit successively.The control end of described the first Drive and Control Circuit 21 and the second Drive and Control Circuit 22 is connected to respectively control output end drv1 and the drv2 of Measurement and Control System 1.
Further, described the first Drive and Control Circuit 21 comprises the first relay J D1 and is used for the first relay drive circuit of control the first relay J D1, described the second drive circuit 22 comprises the second relay J D2 and is used for the second relay drive circuit of control the second relay J D2 that wherein the driving control end of the first relay J D1 and the second relay J D2 is connected to respectively the control output end of Measurement and Control System 1 by the first relay drive circuit and the second relay drive circuit.
With reference to shown in Figure 3, resistance R 1, resistance R 4, the first switch triode Q1 form the first relay drive circuit of the first relay J D1, and wherein D1 is the fly-wheel diode of the first relay J D1; Resistance R 2, resistance R 3, second switch triode Q2 form the second relay drive circuit of the second relay J D2, and D2 is the fly-wheel diode of the second relay J D2.The base stage of above-mentioned the first switch triode Q1 and second switch triode Q2 is connected to respectively control output end drv1 and the drv2 of Measurement and Control System.Wherein the first relay J D1 is a hilted broadsword relay, its relay switch is arranged on the DC loop, the second relay J D2 is a two keys relay, described two group relay switches are arranged at respectively in the ac circuit, and its two group relaies switch is arranged at respectively on the connection line at the two poles of the earth of AC power Vac1, the due to voltage spikes that piezo-resistance VR1 produces when being used for absorbing A.C. contactor 4 disjunction, the wherein utmost point of AC power Vac1 and the connection line of A.C. contactor 4 control coils are provided with resettable fuse PTC1.
The operation principle of this circuit is roughly as follows: when control device begins to power on, A.C. contactor 4 control signal drv1, drv2 is low level, A.C. contactor 4 is in the disjunction state, A.C. contactor 4 turns high by the logical work schedule of disjunction switching: drv2 by low, second switch triode Q2 conducting makes the second relay J D2 closed, two pairs of normally opened contact closures of the second relay J D2 are AC power Vac1, resettable fuse PTC1, low-voltage DC voltage-stabilizing power supply Vdc1, the control coil of A.C. contactor 4 is connected into the loop of a series connection, the coil of A.C. contactor 4 has been applied in the voltage of an AC power Vac1 and low-voltage DC voltage-stabilizing power supply Vdc1 stack, be equivalent to the skew that the direct voltage size has occured zero point of alternating voltage, because the DirectCurrent Voltage Ratio alternating voltage is little a lot, therefore skew can be ignored substantially, the coil of A.C. contactor 4 can be similar to be thought and has been applied in alternating voltage, A.C. contactor 4 gets electric adhesive, drv2 by low turn high after several seconds assurance A.C. contactors 4 of time-delay reliably adhesive make again drv1 turn high by low, drv1 is turned height and is made the first switch triode Q1 conducting by low, the first switch triode Q1 conducting makes the first relay J D1 closed, the normally opened contact of the first relay J D1 is closed the coils from parallel connection of coils of low-voltage DC voltage-stabilizing power supply Vdc1 and A.C. contactor 4, simultaneously AC power Vac1, the loop short circuit of resettable fuse PTC1, resettable fuse PTC1 transfers the high resistant cut-off state to from the low-resistance conducting state immediately cuts off AC power Vac1, A.C. contactor 4 relies on low-voltage DC voltage-stabilizing power supply Vdc1 to keep attracting state, after the first relay J D1 closure, delay time and again drv2 was turned low by height in several seconds, make second switch triode Q2 cut-off, second switch triode Q2 cut-off disconnects the second relay J D2, the short-circuit loop of AC power Vac1 and resettable fuse PTC1 is cut off becomes open circuit, and AC power Vac1 and the complete electrical isolation of control circuit come, PTC1 reverts to the low-resistance conducting state, for next adhesive contactor is prepared, A.C. contactor 4 continues to rely on low-voltage DC voltage-stabilizing power supply Vdd1 to keep attracting state.As long as when attracting state, make drv1 turn low by height, make the first switch triode Q1 cut-off, the first switch triode Q1 cut-off disconnects the first relay J D1, the coil of A.C. contactor 4 and the loop of Vdc1 are cut off by the normally opened contact of the first relay J D1, A.C. contactor 4 dead electricity disjunctions, the due to voltage spikes that piezo-resistance VR1 produces when being used for absorbing A.C. contactor 4 disjunction.As seen from above-mentioned, what the drive circuit of the A.C. contactor that this patent provides adopted is the control circuit that alternating voltage adhesive low-voltage direct-current voltage of voltage regulation is kept attracting state.
The component parameter that adopts in the utility model is as follows:
The HF switch ACDC power supply 3 that adopts in the utility model, its input voltage range is the simultaneously compatible coil rating voltage A.C. contactor that is 220Vac and 380Vac of 132Vac ~ 500Vac, Vdd:12V/8W, Vss:-12V/2W, Vdd1:12V/15W, Vdd2:5V/2W, this disposes the requirement that substantially can satisfy the A.C. contactor of 60 ~ 600A, and (the direct voltage holding power of the contactor of 600A is less than 10W, here by 10W), the output filter capacitor of Vdd1 get the 6600uF/25V alminium electrolytic condenser like this when exchanging the rolling electricity (complete dead electricity) that input is no more than 1 second the voltage of Vdd1 remain more than 10V, contactor can the power down disjunction, and a P6KE16A type of the output-parallel TVS of Vdd1 is used for absorbing the remaining peak voltage that the contactor disjunction produces.This power supply is selected the integrated circuit NCP1337N(QR controller of ON) as control chip; selecting the IFRBG30 type MOSFET(3.1A/1000V of VISHY) z is as switching tube; adopt quasi-resonance flyback topologies, power supply has that defencive function is perfect, reliability is high, conversion efficiency is high, volume is little, low EMI, the suitable characteristics of cost.
Among Fig. 3, resistance R 1, resistance R 2 is got 1k Ω/0.25W, resistance R 3, resistance R 4 is got 10k Ω/0.25W, Vdc1 namely is the Vdd1 of HF switch ACDC power supply 3, the first switch triode Q1, second switch triode Q2 selects the 2SD1950 type triode of NEC, D1, D2 is the 1N4007 diode, resistance VR1 is 14K821 type piezo-resistance (pressure sensitive voltage 820V/3000A), when A.C. contactor 4 coil voltages are 380Vac, Vac1 takes from the two-phase in the three-phase electricity, be line voltage, Vac1 got phase voltage when A.C. contactor 4 coil voltages were 220Vac, resettable fuse PTC1 selects the PTC of 3A/1000V from recovering protective tube, the first relay J D1 selects the hilted broadsword relay of 12V DC voltage control, contact capacity 10A/30Vdc, the second relay J D2 selects the two keys relay of 12V DC voltage control, contact capacity 10A/250Vac.
The micro-control unit 11 of single chip computer measurement control system 1 is selected the PIC18F45K80 of microchip, this single-chip microcomputer has 35 I/O mouths, 11 12 built-in A/D ALT-CH alternate channel, 2 enhancement mode asynchronous serial transceivers, the sheet internal program space of 32KB, the data storage of 3648 bytes, the E of 1024 bytes
2The resources such as ROM are enough to competent this application.Micro-control unit 11 is powered after being depressurized to 5V by Vdd through a LDO.Communication interface 15 is designed to the RS485 interface of light idol isolation, and interface chip uses the SN65HVD3082ED of TI, and the optocoupler of isolation uses the PC817C of Sharp, and communication baud rate is made as 2400Bit/s; Three-phase voltage isolation sample circuit 13 uses the TAV32B-02 type voltage transformer of three Zibo unit stars to finish the isolation collection of three-phase voltage; Signal conditioning circuit 12 is comprised of operational amplifier TL084A, circuit divides two-stage, prime plays the signal amplification amplifying from the signal ratio on demand of three-phase voltage isolation sample circuit 13, rear class is that the sine voltage signal rectification that a precise rectification circuit is sent prime here becomes unidirectional half-sinusoid signal, and this signal one of is delivered in 11 A/D ALT-CH alternate channels of micro-control unit.Such circuit has three, each corresponding phase voltage; Opening into leaving interface circuit 14 has two to open adhesive, the disjunction that entrance is used for the remote key-press control contactor, and leaving port also has two location status and alarm statuses that are respectively applied to detector bar; LED light circuit 16 is established respectively one of communication indication, alarm indication, contactor location status indicator light; Button, switch 17 are established two of buttons, one on switch, and switch is used for arranging the contactor control model, and automatic, manual two kinds of patterns are arranged, and two buttons are used for adhesive, the disjunction of control contactor when manual control pattern.
With reference to the second embodiment of the present utility model shown in Figure 4, the utility model also can be applicable to the control device of duplicate supply switching controls, its objective is by control A.C. contactor A.C. contactor 4A, A.C. contactor 4B from the two-way three-phase alternating current (three-phase alternating current the figure-A road independently, three-phase alternating current-B road) select normal one the tunnel to be load supplying in, thus the proof load power supply reliability.The difference of Fig. 4 and Fig. 1 is: single chip computer measurement control system 1 has two three-phase voltage isolation sample circuits (13A, 13B among the figure), can gather simultaneously the two-way three-phase alternating voltage, certain signal conditioning circuit 12 is 3 passages of increase of correspondence also, two HF switch ACDC power supplys (3A, 3B among the figure) are arranged, the two-way three-phase alternating current is taken from respectively in two power supply inputs, so, when wherein one road three-phase alternating current broke down, control device was unlikely to dead electricity and quits work.Output VddA, the VddB of two power supplys is in parallel by diode D5A, D5B, any one has electric Vdd that electricity is just arranged, D5A, D5B select the RL203 type diode of MCC, in like manner Vss, Vdd2 also are in parallel and get through diode D4A, D4B, D3A, D3B by VssA, VssB, Vdd2A, Vdd2B respectively, and D4A, D4B, D3A, D3B select the 1N4007 type diode of MCC; There are two duplicate driving circuit of AC contactors (2A, 2B among the figure) to be respectively applied to control A.C. contactor A.C. contactor 4A, A.C. contactor 4B, the AC power Vac1A, the Vac1B that are used for adhesive take from respectively the two-way three-phase alternating current, keep low-voltage DC voltage-stabilizing power supply that adhesive uses respectively from Vdd1A, the Vdd1B of two HF switch ACDC power supply 3A, 3B.More than be the main distinction of embodiment two and embodiment one, remaining hardware, software and function can slightly adjust according to practical application, just no longer carefully state here.
The above is preferred embodiment of the present utility model, and the utility model is not limited to above-mentioned execution mode, as long as it reaches technique effect of the present utility model with identical means, all should belong to protection range of the present utility model.
Claims (10)
1. the A.C. contactor intelligence controlling device of a tool energy-conserving action, comprise the Measurement and Control System (1) take micro-control unit as core, HF switch ACDC power supply (3) and driving circuit of AC contactor (2), the sampling input of described Measurement and Control System (1) is connected to the three-phase alternating current electrical input of A.C. contactor, the control output end of Measurement and Control System (1) is connected with the driving control end of driving circuit of AC contactor (2), the drive output of driving circuit of AC contactor (2) is connected to the control coil of A.C. contactor, HF switch ACDC power supply (3) links to each other with driving circuit of AC contactor (2) with Measurement and Control System (1) respectively provides operating voltage, it is characterized in that: described driving circuit of AC contactor (2) comprises the first Drive and Control Circuit (21) with switch control action, the second Drive and Control Circuit (22), the low-voltage DC voltage-stabilizing power supply (Vdc1) that is provided by HF switch ACDC power supply (3) also is provided, power taking consists of from three-phase alternating current AC power (Vac1) and resettable fuse (PTC1), described the first Drive and Control Circuit (21), the control coil series connection of low-voltage DC voltage-stabilizing power supply (Vdc1) and A.C. contactor consists of DC loop, described the second Drive and Control Circuit (22), resettable fuse (PTC1), AC power (Vac1), the control coil series connection of low-voltage DC voltage-stabilizing power supply (Vdc1) and A.C. contactor consists of ac circuit, and the control end of described the first Drive and Control Circuit (21) and the second Drive and Control Circuit (22) is connected to respectively the control output end of Measurement and Control System (1).
2. the A.C. contactor intelligence controlling device of a kind of tool energy-conserving action according to claim 1 is characterized in that: described AC power (Vac1), low-voltage DC voltage-stabilizing power supply (Vdc1), A.C. contactor control coil, resettable fuse (PTC1) and the second Drive and Control Circuit (22) are connected in series successively and consist of the loop.
3. the A.C. contactor intelligence controlling device of a kind of tool energy-conserving action according to claim 1 and 2, it is characterized in that: described the first Drive and Control Circuit (21) comprises the first relay (JD1) and is used for the first relay drive circuit of control the first relay (JD1), described the second Drive and Control Circuit (22) comprises the second relay (JD2) and is used for the second relay drive circuit of control the second relay (JD2) that wherein the driving control end of the first relay (JD1) and the second relay (JD2) is connected to respectively the control output end of Measurement and Control System (1) by the first relay drive circuit and the second relay drive circuit.
4. the A.C. contactor intelligence controlling device of a kind of tool energy-conserving action according to claim 3, it is characterized in that: described the first relay (JD1) is the hilted broadsword relay, and its relay switch is arranged on the DC loop; Described the second relay (JD2) is two keys relay, described two keys relay comprises two group relay switches, described two group relay switches are arranged in the ac circuit respectively, and two group relay switches are arranged at respectively on the connection line at AC power (Vac1) the two poles of the earth.
5. the A.C. contactor intelligence controlling device of a kind of tool energy-conserving action according to claim 4, it is characterized in that: a wherein utmost point of AC power (Vac1) and the connection line of A.C. contactor control coil are provided with resettable fuse (PTC1); Described A.C. contactor control coil is parallel with piezo-resistance (VR1).
6. the A.C. contactor intelligence controlling device of a kind of tool energy-conserving action according to claim 1, it is characterized in that: described Measurement and Control System (1) comprises three-phase voltage isolation sample circuit (13), signal conditioning circuit (12) and the micro-control unit (11) that in succession connects successively, and the control output end of described micro-control unit (11) is connected to driving circuit of AC contactor (2); Three-phase voltage isolation sample circuit (13) is connected to the three-phase alternating current electrical input of A.C. contactor.
7. the A.C. contactor intelligence controlling device of a kind of tool energy-conserving action according to claim 6 is characterized in that: described Measurement and Control System (1) also comprises for being connected with micro-control unit (11) with communication interface circuit (15), described communication interface circuit (15) that computer communicates.
8. the A.C. contactor intelligence controlling device of a kind of tool energy-conserving action according to claim 6, it is characterized in that: described Measurement and Control System (1) comprises that also described opening into leaving interface circuit (14) is connected with micro-control unit (11) for realizing the opening into leaving interface circuit (14) of remote signalling, distant control function.
9. the A.C. contactor intelligence controlling device of a kind of tool energy-conserving action according to claim 6, it is characterized in that: described Measurement and Control System (1) also comprises the LED light circuit (16) that is used to indicate A.C. contactor position and communications status, and described LED light circuit (16) is connected with micro-control unit (11).
10. the A.C. contactor intelligence controlling device of a kind of tool energy-conserving action according to claim 6, it is characterized in that: described Measurement and Control System (1) comprises that also be used to the key switch circuit (17) that control model is set, described key switch circuit (17) is connected with micro-control unit (11).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201220427389.4U CN202888081U (en) | 2012-08-27 | 2012-08-27 | AC contactor intelligent control apparatus with energy saving effect |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201220427389.4U CN202888081U (en) | 2012-08-27 | 2012-08-27 | AC contactor intelligent control apparatus with energy saving effect |
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| CN202888081U true CN202888081U (en) | 2013-04-17 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104716738A (en) * | 2015-04-04 | 2015-06-17 | 佛山蓝途科技有限公司 | Circuit for CC-level double-power-supply automatic changeover switching appliance |
| CN104715972A (en) * | 2015-04-04 | 2015-06-17 | 佛山蓝途科技有限公司 | Double-power-supply automatic changeover switching device |
| WO2015180511A1 (en) * | 2014-05-27 | 2015-12-03 | 华为技术有限公司 | Contactor driving circuit |
| CN107255971A (en) * | 2017-07-03 | 2017-10-17 | 惠州市天泽盈丰物联网科技股份有限公司 | Garment hanging system, controller and power supply protection circuit |
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| CN112987625A (en) * | 2021-04-20 | 2021-06-18 | 西安拓尔微电子有限责任公司 | Control circuit, method for detecting voltage, electronic device and control method thereof |
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- 2012-08-27 CN CN201220427389.4U patent/CN202888081U/en not_active Expired - Lifetime
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2015180511A1 (en) * | 2014-05-27 | 2015-12-03 | 华为技术有限公司 | Contactor driving circuit |
| CN104716738A (en) * | 2015-04-04 | 2015-06-17 | 佛山蓝途科技有限公司 | Circuit for CC-level double-power-supply automatic changeover switching appliance |
| CN104715972A (en) * | 2015-04-04 | 2015-06-17 | 佛山蓝途科技有限公司 | Double-power-supply automatic changeover switching device |
| CN104716738B (en) * | 2015-04-04 | 2017-09-26 | 佛山科学技术学院 | A kind of circuit for the automatic change-over electric appliance with duplicate for being used for CC grades |
| CN107255971A (en) * | 2017-07-03 | 2017-10-17 | 惠州市天泽盈丰物联网科技股份有限公司 | Garment hanging system, controller and power supply protection circuit |
| CN107768196A (en) * | 2017-11-30 | 2018-03-06 | 惠州市蓝微新源技术有限公司 | A kind of control system for reducing relay power consumption |
| CN109245492A (en) * | 2018-08-28 | 2019-01-18 | 广州金升阳科技有限公司 | A kind of multiple-output electric power |
| CN109545621A (en) * | 2018-11-05 | 2019-03-29 | 北京卫星制造厂有限公司 | A kind of driving circuit applied to the high-power contactor of aerospace |
| CN109545621B (en) * | 2018-11-05 | 2020-07-14 | 北京卫星制造厂有限公司 | Driving circuit applied to aerospace high-power contactor |
| CN112987625A (en) * | 2021-04-20 | 2021-06-18 | 西安拓尔微电子有限责任公司 | Control circuit, method for detecting voltage, electronic device and control method thereof |
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Effective date of registration: 20140911 Address after: 519080 No. 99, University Road, Harbour Road, Guangdong, Zhuhai Patentee after: ZHUHAI WATT ELECTRICAL EQUIPMENT Co.,Ltd. Address before: Xiangzhou District of Guangdong province 519000 Xia Mei Lu Zhuhai City No. 161 building 3 unit 2 Room 403 Patentee before: Guan Ping |
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