CN204013453U - A kind of switching circuit that reduces electromagnetic interference - Google Patents
A kind of switching circuit that reduces electromagnetic interference Download PDFInfo
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- CN204013453U CN204013453U CN201420383963.XU CN201420383963U CN204013453U CN 204013453 U CN204013453 U CN 204013453U CN 201420383963 U CN201420383963 U CN 201420383963U CN 204013453 U CN204013453 U CN 204013453U
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Abstract
A kind of switching circuit that reduces electromagnetic interference, comprise the first terminals and the second terminals that are connected with AC power, load respectively, be connected to control loop between first and second terminals, be connected in series between two terminals for the dynamic and static stabilized voltage power supply to control loop power supply, and the controllable silicon by control loop control or the CMOS that are connected in series between two terminals manage, their form the electric current major loop of switching circuit.This circuit also comprises that one is incorporated to the coordinated type switching circuit in electric current major loop, comprises for reducing the filter network of electromagnetic interference with for controlling filter network and reacts circuit with the interlock of switching circuit synchronous interaction.The utility model designs for the electromagnetic interference problem that adopts controllable silicon or CMOS pipe to cause as major loop, provide a kind of control simple, with low cost, can better solve the scheme of electromagnetic compatibility problem, and guarantee coordinated type switching circuit no standby power.
Description
Technical field
The utility model relates to the single-fire-wire electronic switch of a kind of family expenses and similar applications fixed electric, particularly a kind of circuit of the single-fire-wire electronic switch based on controllable silicon or CMOS management and control system.
Background technology
As everyone knows, electronic devices and components in appliance circuit are in completing self function, can attach the transmitting that produces electromagnetic energy, form electromagnetic interference, electronic switch (being also referred to as switching circuit) is no exception, it often adopts the switching regulator semiconductor device such as controllable silicon or CMOS pipe, under these devices are in running order, often there is the low-frequency band electromagnetic interference below 2M Hz, this low-frequency band electromagnetic interference can be propagated by the mode of conduction and radiation, special its switch motion is the main cause that causes producing electromagnetic interference.The first terminals L of this kind of switching circuit is connected with the output of AC power (normally live wire output), its second terminals LA is connected with the input (normally live wire input) of load, be that this kind of switching circuit do not exist ground wire, therefore, it is referred to as single live wire switch electronic circuit conventionally, and this single live wire switch electronic main circuit will exist differential mode interference.The general way that solves differential mode interference has two kinds, one is to increase low pass filter on power circuit plate, another kind is on switching device, to increase filtering processing, but these solutions tend to increase the stand-by power consumption of single live wire switching circuit, thereby affect the normal usage energy of product, caused again in addition the new defect that does not meet energy-conserving and environment-protective.
The harm of electromagnetic interference is very large, can cause the unstable of other electronic device works, the power-type switching circuit of the on/off especially for control with loaded major loop, this major loop is generally the alternating current circuit of the very large load of carrying, therefore its electromagnetic interference not only cannot be ignored, but also can produce harmful effect to the stability of the equipment in the major loop of its control, even cause damage.Because the electromagnetic interference harmfulness of this type of switching circuit is large, if do not reduce electromagnetic interference, not only can cause the degradation of the unstable and function of the machine product, but also directly affect the machine competitiveness of product in market, so it is subject to the criteria limit of a lot of world/countries, even forbids.In addition, along with human living standard's raising, people can have higher pursuit to quality of life and health, and " eliminating electromagnetic interference, purifying electric magnetic environment " will be the irresistible trend in the whole world.
Utility model content
In order to have overcome the defect of above-mentioned prior art, the purpose of this utility model is to provide a kind of switching circuit that reduces electromagnetic interference, it adopts filter network and interlock reaction circuit engineering in the switching circuit that adopts the switching regulator semiconductor device such as controllable silicon or CMOS pipe, the switching of filter network and the operation of switching circuit interlock are realized, can not only on the basis of proper property that does not change product, obviously reduce its electromagnetic interference, and can neither affect switch stand-by power consumption, the conducted interference producing can solve work again time, also have advantages of that control is simple and with low cost.
For achieving the above object, the utility model has adopted following technical scheme.
A kind of switching circuit that reduces electromagnetic interference, comprise respectively and AC power 200, the first terminals L that load 300 connects and the second terminals LA, be connected to the control loop 13 between the first terminals L and the second terminals LA, be connected in series in dynamic stabilized voltage power supply 11 and static stabilized voltage power supply 17 for powering to control loop 13 between the first terminals L and the second terminals LA, and the controllable silicon of being controlled by control loop 13 or the CMOS that are connected in series between the first terminals L and the second terminals LA manage 14, described controllable silicon or CMOS pipe 14 form the electric current major loop of described switching circuit 100, the switching circuit 100 of wherein said reduction electromagnetic interference also comprises that one is incorporated to the coordinated type switching circuit in described electric current major loop, it comprises for reducing the filter network 16 of electromagnetic interference with for controlling filter network 16 reacts circuit 15 with the interlock of described switching circuit 100 synchronous interactions.
A kind of embodiment of the present utility model is: described interlock reaction circuit 15 has comprised relay K 1, protection diode D5 and the current-limiting resistance R15 of on/off circuit function, and wherein relay K 1 is double-pole or hilted broadsword.
Two kinds of embodiments of linked switch circuit of the present utility model are: the signal input part 150 of the relay K 1 of described linked switch circuit interlock reaction circuit 15 is driven by the control signal of the control output end of control loop 13, or the control voltage of the direct-flow positive pole VCC that signal input part 150 is exported by dynamic stabilized voltage power supply 11 drives, control the on/off of the output loop of described filter network 16, the switching conversion of described filter network 16 is subject to the control of the on/off of described output loop.
A kind of embodiment of the present utility model is: described filter network 16 comprises inductance L 1, capacitor C 5 and/or capacitor C 6; And by one end of one end of described inductance L 1 and described capacitor C 5 structure forming Γ-shape filter network that is connected in parallel; Or by one end of one end of described inductance L 1 and described capacitor C 6 structure forming Γ-shape filter network that is connected in parallel; Or be connected in parallel and by one end of the other end of described inductance L 1 and described capacitor C 6 π shape filter network forming that is connected in parallel by one end of one end of described inductance L 1 and described capacitor C 5.
Preferably, described filter network 16 also comprises respectively the resistance R 5, the resistance R 6 that are connected in parallel with capacitor C 5, capacitor C 6.
A kind of execution mode of coordinated type switching circuit of the present utility model is: described coordinated type switching circuit comprises relay K 1, protection diode D5, current-limiting resistance R15, capacitor C 5, resistance R 5, capacitor C 6, resistance R 6 and inductance L 1; 1 pin of described relay K 1, the negative pole of protection diode D5 are connected in parallel with the direct-flow positive pole VCC of dynamic stabilized voltage power supply 11, forming 2 pin of the relay K 1 of excitation input circuit, the positive pole of protection diode D5 and one end of current-limiting resistance R15 with 1 pin of relay K 1 is connected in parallel, the direct current negative pole of the dynamic stabilized voltage power supply 11 of another termination of current-limiting resistance R15,3 pin of relay K 1 and 4 pin form the first output loop of contact point mode, 9 pin of relay K 1 and 10 pin form the second output loop of contact point mode, and described 9 pin, 10 pin and the first terminals L are connected in parallel; One end of one end of described inductance L 1, one end of capacitor C 5, resistance R 5 and the second terminals LA of described switching circuit are connected in parallel, the other end of inductance L 1, one end of capacitor C 6, one end of resistance R 6 and the major loop of described switching circuit are connected in parallel, 10 pin of the other end of capacitor C 5, the other end of resistance R 5 and relay K 1 are connected in parallel, and 3 pin of the other end of capacitor C 6, the other end of resistance R 6 and relay K 1 are connected in parallel.
Another execution mode of coordinated type switching circuit of the present utility model is: described coordinated type switching circuit comprises relay K 1, protection diode D5, current-limiting resistance R15, capacitor C 6, resistance R 6 and inductance L 1; 1 pin of described relay K 1, the negative pole of protection diode D5 are connected in parallel with the direct-flow positive pole VCC of dynamic stabilized voltage power supply 11, forming 2 pin of the relay K 1 of excitation input circuit, the positive pole of protection diode D5 and one end of current-limiting resistance R15 with 1 pin of relay K 1 is connected in parallel, the direct current negative pole of the dynamic stabilized voltage power supply 11 of another termination of current-limiting resistance R15,3 pin of relay K 1 and 4 pin form the first output loop of contact point mode, and described 4 pin are connected with the first terminals L; The second terminals LA of switching circuit described in one termination of described inductance L 1, the other end of inductance L 1, one end of capacitor C 6, one end of resistance R 6 and the major loop of described switching circuit are connected in parallel, and 3 pin of the other end of capacitor C 6, the other end of resistance R 6 and relay K 1 are connected in parallel.
The another kind of execution mode of coordinated type switching circuit of the present utility model is: described coordinated type switching circuit comprises relay K 1, protection diode D5 and current-limiting resistance R15, and described filter network 16 comprises capacitor C 5, resistance R 5 and inductance L 1; 1 pin of described relay K 1, the negative pole of protection diode D5 are connected in parallel with the direct-flow positive pole VCC of dynamic stabilized voltage power supply 11, forming 2 pin of the relay K 1 of excitation input circuit, the positive pole of protection diode D5 and one end of current-limiting resistance R15 with 1 pin of relay K 1 is connected in parallel, the direct current negative pole of the dynamic stabilized voltage power supply 11 of another termination of current-limiting resistance R15,9 pin of relay K 1 and 10 pin form the second output loop of contact point mode, and described 9 pin are connected with the first terminals L; One end of one end of described inductance L 1, one end of capacitor C 5, resistance R 5 and the second terminals LA of described switching circuit are connected in parallel, the major loop of switching circuit described in another termination of inductance L 1,10 pin of the other end of capacitor C 5, the other end of resistance R 5 and relay K 1 are connected in parallel.
Preferably, the control voltage that the direct-flow positive pole VCC of described dynamic stabilized voltage power supply 11 provides is 3V to 48V.
Preferably, described resistance R 5, resistance R 6 are respectively 680k Ω; Described capacitor C 5, capacitor C 6 are respectively 0.47 μ F; Described inductance L 1 is 300 μ H.
Adopt the coordinated type switching circuit of the utility model technique scheme, its filter network adopts and has the circuit structure that reduces electromagnetic interference and suppress surge dual-use function concurrently, its interlock reaction circuit adopts the driving relay of micro-power consumption as switching controller part, can significantly reduce or eliminate the electromagnetic interference of former ordinary tap circuit, significantly improve the antisurge performance of switching circuit, can better solve the problem of electromagnetic compatibility, and, filter network and interlock reaction circuit idle under holding state, under running status its power consumption atomic a little less than.
Brief description of the drawings
Fig. 1 is the circuit block diagram of the first embodiment of the switching circuit 100 of reduction electromagnetic interference of the present utility model.
Fig. 2 is the circuit block diagram of the second embodiment of the switching circuit 100 of reduction electromagnetic interference of the present utility model.
Fig. 3 is the circuit block diagram of the 3rd embodiment of the switching circuit 100 of reduction electromagnetic interference of the present utility model.
Fig. 4 is the circuit diagram of the first concrete structure scheme of the filter network 16 in the first embodiment shown in Fig. 1 and the reaction circuit 15 that links.
Fig. 5 is the circuit diagram of the second concrete structure scheme of the filter network 16 in the first embodiment shown in Fig. 1 and the reaction circuit 15 that links.
Fig. 6 is the circuit diagram of the 3rd concrete structure scheme of the filter network 16 in the first embodiment shown in Fig. 1 and the reaction circuit 15 that links.
Embodiment
The embodiment providing below in conjunction with accompanying drawing 1 to 6, describes the embodiment of the switching circuit of reduction electromagnetic interference of the present utility model in detail, and the switching circuit of reduction electromagnetic interference of the present utility model is not limited to the description of following examples.
Fig. 1-3 are respectively the circuit block diagrams of three embodiment of the switching circuit 100 of reduction electromagnetic interference of the present utility model.In Fig. 1,2, show respectively by the direct-flow positive pole VCC of dynamic stabilized voltage power supply 11 and provide to the signal input part 150 of interlock reaction circuit 15 circuit structure and the control relation of controlling voltage, wherein Fig. 2 is the equivalent circuit theory block diagram of the first embodiment shown in Fig. 1, shows circuit structure and control relation that control signal is provided to signal input part 150 by the control output end of control loop 13 in Fig. 3.Referring to Fig. 1, Fig. 2, the environment for use of the switching circuit 100 (being designated hereinafter simply as switching circuit) of reduction electromagnetic interference of the present utility model is to be connected in series in the major loop of AC power 200 and load 300, that is to say, switching circuit 100 must comprise the first terminals L and the second terminals LA, they are connected with AC power 200, load 300 respectively, and the particular circuit configurations of the switching circuit of reduction electromagnetic interference of the present utility model is all arranged between the first terminals L and the second terminals LA.Because switching circuit 100 is a kind of single live wire switch electronic circuit, therefore between the first terminals L and the second terminals LA, there is not polarity, in other words, in actual use, allow the first terminals L and the second terminals LA to have and just connect and two kinds of modes of connection of reversal connection.Specifically, Fig. 2 is that from the difference of Fig. 1 the definition of the first terminals L and the second terminals LA is different, the node being defined as in Fig. 1 in the switching circuit 100 of the first terminals L is defined as the second terminals LA in Fig. 2, the node being defined as in Fig. 1 in the switching circuit 100 of the second terminals LA is defined as the first terminals L in Fig. 2, if definition Figure 1 shows that the mode that just connects, the first terminals L connects AC power 200, the second terminals LA connects load 300, Figure 2 shows that reversal connection mode, the first terminals L connects load 300, the second terminals LA connects AC power 200.
The switching circuit of reduction electromagnetic interference of the present utility model comprises respectively and AC power 200, the first terminals L that load 300 connects and the second terminals LA, be connected in series in the electric current major loop of the controllable silicon of being controlled by control loop 13 between the first terminals L and the second terminals LA or CMOS pipe 14 switching circuit 100 described in forming, and be connected in series in dynamic stabilized voltage power supply 11 and the static stabilized voltage power supply 17 for powering to control loop 13 between the first terminals L and the second terminals LA, two-way power supply forms the electric power loop of powering to control loop 13, be connected to and between the first terminals L and the second terminals LA, form the controllable silicon of electric current major loop or CMOS pipe 14 is connected with control loop 13, the alternating current that AC power 200 provides to load 300 flows through from described major loop, dynamically stabilized voltage power supply 11 and static stabilized voltage power supply 17 are obtained alternating current by described electric power loop from AC power 200, and alternating current is converted to the backward control loop 13 of direct current power supply is provided.The switching circuit 100 of reduction electromagnetic interference of the present utility model also comprises the coordinated type switching circuit being incorporated in described major loop, and it comprises for reducing the filter network 16 of electromagnetic interference with for controlling filter network 16 reacts circuit 15 with the interlock of described switching circuit 100 synchronous interactions.Interlock reaction circuit 15 has comprised relay K 1, protection diode D5 and the current-limiting resistance R15 of on/off circuit function; wherein relay K 1 used according to the execution mode of prior art for double-pole or hilted broadsword relay; 4.5V work, the micro-power consumption of 100mW drives.
Control loop 13 shown in Fig. 1, dynamically stabilized voltage power supply 11 and static stabilized voltage power supply 17 can adopt known circuit structure.Control loop 13 comprises one for exporting the control output end of control signal, this control output end is connected with the control input end of controllable silicon or CMOS pipe 14, thereby set up a kind of control signal control controllable silicon of being exported by control loop 13 or CMOS pipe 14 cut-off or saturated control relations, that is: at control loop 13 during to controllable silicon or CMOS pipe 14 output high level, controllable silicon or CMOS manage 14 saturated, described major loop conductings; In the time that control loop 13 is managed 14 output low level to controllable silicon or CMOS, controllable silicon or 14 cut-offs of CMOS pipe, described major loop disjunction.Should understand, dynamically in stabilized voltage power supply 11 and static stabilized voltage power supply 17, include DC-AC change-over circuit, can form direct-flow positive pole and direct current negative pole by this change-over circuit, provide DC power supply by direct-flow positive pole and direct current negative pole to control loop 13.In dynamic stabilized voltage power supply 11, available known method forms the direct-flow positive pole VCC with dynamic characteristic, make: at control loop 13 during to controllable silicon or CMOS pipe 14 output high level, between direct-flow positive pole VCC and direct current negative pole, there is high voltage, in the time that control loop 13 is managed 14 output low level to controllable silicon or CMOS, the voltage between direct-flow positive pole VCC and direct current negative pole is 0 or low-voltage.
Interlock reaction circuit 15 and filter network 16 in coordinated type switching circuit of the present utility model can have various structures scheme, the first or second embodiment of the switching circuit of the reduction electromagnetic interference of the present utility model providing referring to Fig. 1, Fig. 2 and Fig. 4 to Fig. 6, further illustrating the several preferred concrete structure scheme of interlock reaction circuit 15 and filter network 16.Interlock reaction circuit 15 of the present utility model comprises signal input part 150 and is connected to the output loop of filter network 16, direct-flow positive pole VCC by dynamic stabilized voltage power supply 11 provides control voltage to signal input part 150, by the on/off of output loop described in this control voltage control, then by the switching of the on/off control filter network 16 of output loop." switching " described herein refers to that filter network 16 puts into operation and switching out of service, specifically, controlled the on/off of the output loop of interlock reaction circuit 15 by the high/low state of the voltage of the direct-flow positive pole VCC of dynamic stabilized voltage power supply 11, then by this on/off control filter network 16 put into operation/out of service.That is:, under the state of connecting at described output loop, filter network 16 puts into operation and strobes; Under the state of described output loop disjunction, filter network 16 is out of service, not produce power consumption, saves energy.That is to say, the utility model adopts the mode of relay switching, to guarantee the stable and normal work of static state, dynamic property.Therefore,, when the operating state that circuit lights in lamp such as only having, filter network 16 could be devoted oneself to work, thereby can neither affect switch stand-by power consumption, the conducted interference producing can solve work again time.Should understand, because the conversion of high/low state of voltage and the conversion of the on/off state of switching circuit 100 of direct-flow positive pole VCC are synchronizeed, synchronously put into operation with the connection of switching circuit 100 so can realize filter network 16, or filter network 16 is synchronously out of service with the disjunction of switching circuit 100.
The 3rd embodiment of the switching circuit of the reduction electromagnetic interference of the present utility model providing referring to Fig. 3, described interlock reaction circuit 15 comprises signal input part 150 and is connected to the output loop of filter network 16, with Fig. 1, 2 first, the second embodiment difference is, not provide control voltage by the direct-flow positive pole VCC of dynamic stabilized voltage power supply 11 to signal input part 150, but provide control signal by the control output end of control loop 13 to signal input part 150, by the on/off of output loop described in this control signal control, then by the switching of the on/off control filter network 16 of described output loop.Described control signal can be that the control output end of control loop 13 is to the same control signal of controllable silicon or 14 outputs of CMOS pipe, obvious this control mode also can realize filter network 16 and synchronously put into operation with the connection of switching circuit 100, and filter network 16 with the disjunction of switching circuit 100 synchronous function out of service.But, this control mode can make interlock reaction circuit 15 adopt semiconductor device again, these devices may produce secondary electromagnetic interference, in the case of the semiconductor device described in reasonable selection, also have to obtain secondary electromagnetic interference is reduced to minimum possibility, make this control mode still there is practical value.
The concrete implementing circuit of the switching circuit of the reduction electromagnetic interference of the present utility model providing referring to Fig. 4 to Fig. 6, described filter network 16 comprises inductance L 1, capacitor C 5 and/or capacitor C 6, inductance L 1 is connected in series in major loop, and therefore it has filtering and antisurge is difunctional; The filter network 16 being made up of inductance L 1, capacitor C 5 and/or capacitor C 6 has the function of desirable reduction electromagnetic interference, particularly, for the low-frequency band disturbing wave below filtering 2M Hz, has significant effect.Can be by one end of one end of described inductance L 1 and described capacitor C 5 structure forming Γ-shape filter network that is connected in parallel; Or, by one end of one end of described inductance L 1 and described capacitor C 6 structure forming Γ-shape filter network that is connected in parallel; Or, be connected in parallel and be connected in parallel and form π shape filter network by the other end of the other end of described inductance L 1 and described capacitor C 6 by one end of one end of described inductance L 1 and described capacitor C 5.Specifically, having concurrently shown in Fig. 4-6 falls electromagnetic interference and the bifunctional filter network of antisurge can have three kinds of concrete versions: a kind of form as shown in Figure 5, described filter network 16 comprises inductance L 1 and capacitor C 5, by one end of inductance L 1 and one end of capacitor C 5 Γ shape filter network forming that is connected in parallel; As shown in Figure 6, described filter network 16 comprises inductance L 1 and capacitor C 6 to another kind of form, by one end of inductance L 1 and one end of capacitor C 6 Γ shape filter network forming that is connected in parallel; Another form as shown in Figure 4, described filter network 16 comprises inductance L 1, capacitor C 5 and capacitor C 6, by one end of inductance L 1 and one end of capacitor C 5 is connected in parallel and be connected in parallel by the other end of inductance L 1 and one end of capacitor C 6 π shape filter network formed.In order further to optimize the performance that reduces electromagnetic interference, a kind of scheme adopting of selecting is, described filter network 16 also comprises respectively the resistance R 5, the resistance R 6 that are connected in parallel with capacitor C 5, capacitor C 6, that is: under mode as shown in Figure 5, filter network 16 also comprises the resistance R 5 being connected in parallel with capacitor C 5; Under form as shown in Figure 6, filter network 16 also comprises the resistance R 6 being connected in parallel with capacitor C 6; And under form as shown in Figure 4, filter network 16 also comprises the resistance R 5 being connected in parallel with capacitor C 5 and the resistance R 6 being connected in parallel with capacitor C 6.
The overall structure of the coordinated type switching circuit being made up of interlock reaction circuit 15 and filter network 16 can have multiple concrete scheme, and preferred scheme as shown in Figures 4 to 6.Wherein the relay K 1 of interlock reaction circuit 15 is as needed under the execution mode as shown in Fig. 4 with double-pole, there to be two output loops to access for C5, R5 and C6, the filtering of R6 two-way respectively; Or as can be used hilted broadsword instead under the execution mode as shown in Fig. 5 or Fig. 6, just can meet the access of C5, R5 or C6, R6Zhong mono-tunnel filtering access, certainly with double-pole also can, have like this output loop by redundancy.
As shown in Figure 4, referring to Fig. 4, described coordinated type switching circuit comprises relay K 1, protection diode D5, current-limiting resistance R15, capacitor C 5, resistance R 5, capacitor C 6, resistance R 6 and inductance L 1 to a kind of coordinated type switching circuit.1 pin of described relay K 1, the negative pole of protection diode D5 are connected in parallel with the direct-flow positive pole VCC of dynamic stabilized voltage power supply 11; forming 2 pin of the relay K 1 of excitation input circuit, the positive pole of protection diode D5 and one end of current-limiting resistance R15 with 1 pin is connected in parallel; the direct current negative pole of the dynamic stabilized voltage power supply 11 of another termination of current-limiting resistance R15; 3 pin of relay K 1 and 4 pin form the first output loop of contact point mode; 9 pin of relay K 1 and 10 pin form the second output loop of contact point mode, and described 9 pin, 10 pin and the first terminals L are connected in parallel.One end of one end of described inductance L 1, one end of capacitor C 5, resistance R 5 and the second terminals LA of described switching circuit are connected in parallel, the other end of inductance L 1, one end of capacitor C 6, one end of resistance R 6 and the major loop of described switching circuit are connected in parallel, 10 pin of the other end of capacitor C 5, the other end of resistance R 5 and relay K 1 are connected in parallel, and 3 pin of the other end of capacitor C 6, the other end of resistance R 6 and relay K 1 are connected in parallel.
As shown in Figure 5, referring to Fig. 5, described coordinated type switching circuit comprises relay K 1, protection diode D5 and current-limiting resistance R15 to the second coordinated type switching circuit, and described filter network 16 comprises capacitor C 5, resistance R 5 and inductance L 1.1 pin of described relay K 1, the negative pole of protection diode D5 are connected in parallel with the direct-flow positive pole VCC of dynamic stabilized voltage power supply 11, forming 2 pin of the relay K 1 of excitation input circuit, the positive pole of protection diode D5 and one end of current-limiting resistance R15 with 1 pin is connected in parallel, the direct current negative pole of the dynamic stabilized voltage power supply 11 of another termination of current-limiting resistance R15,9 pin of relay K 1 and 10 pin form the second output loop of contact point mode, and described 9 pin are connected with the first terminals L; One end of one end of described inductance L 1, one end of capacitor C 5, resistance R 5 and the second terminals LA of described switching circuit are connected in parallel, the major loop of switching circuit described in another termination of inductance L 1,10 pin of the other end of capacitor C 5, the other end of resistance R 5 and relay K 1 are connected in parallel.
As shown in Figure 6, referring to Fig. 6, described coordinated type switching circuit comprises relay K 1, protection diode D5, current-limiting resistance R15, capacitor C 6, resistance R 6 and inductance L 1 to the third coordinated type switching circuit.1 pin of described relay K 1, the negative pole of protection diode D5 are connected in parallel with the direct-flow positive pole VCC of dynamic stabilized voltage power supply 11, forming 2 pin of the relay K 1 of excitation input circuit, the positive pole of protection diode D5 and one end of current-limiting resistance R15 with 1 pin is connected in parallel, the direct current negative pole of the dynamic stabilized voltage power supply 11 of another termination of current-limiting resistance R15,3 pin of relay K 1 and 4 pin form the first output loop of contact point mode, and described 4 pin are connected with the first terminals L; The second terminals LA of switching circuit described in one termination of described inductance L 1, the other end of inductance L 1, one end of capacitor C 6, one end of resistance R 6 and the major loop of described switching circuit are connected in parallel, and 3 pin of the other end of capacitor C 6, the other end of resistance R 6 and relay K 1 are connected in parallel.
Visible, the utility model reduces the switching circuit of electromagnetic interference owing to having adopted coordinated type switching circuit, therefore can not only significantly reduce the electromagnetic interference of switching circuit product, the significantly antisurge ability of lifting switch circuit product, and guaranteed coordinated type switching circuit no standby power.In order to reduce the power consumption under running status, for first, the voltage design of the direct-flow positive pole VCC of the dynamic stabilized voltage power supply 11 of two embodiments needs to optimize, to adapt to electronic device or the circuit of low-power consumption, this dynamic stabilized voltage power supply 11 can be exported 7V voltage in the time of switch, can drive relay K 1 to move, filter network 16 is loaded into major loop two ends, play the object that suppresses conducted interference, in the time entering holding state, this network disconnects, only have inductance L 1 to be serially connected in major loop, play the effect of antisurge, do not increase again stand-by power consumption, reach a kind of and object power supply linkage action.The concrete prioritization scheme of described dynamic stabilized voltage power supply 11 is: the control voltage that the direct-flow positive pole VCC of its output provides is 4V to 12V.Obviously, in this voltage range, can make the electronic device of micro power consumption and dependable performance can be used for coordinated type switching circuit, as relay K 1, optional with voltage be 4.5V, the power consumption double-pole that is 100mW or the slight power consumption relay of hilted broadsword.In order further to guarantee the performance of switching circuit of reduction electromagnetic interference of the present utility model, the concrete structure parameter of the coordinated type switching circuit of the present utility model shown in a kind of Fig. 4 to Fig. 6 of comprising can further be optimized for: described resistance R 5, resistance R 6 are respectively 680k Ω; Described capacitor C 5, capacitor C 6 are respectively 0.47 μ F; Described inductance L 1 is 300 μ H.In addition, the first terminals L of described switching circuit 100 and the second terminals LA, to changing the first terminals LA and the second terminals L into, the switching circuit of this reduction electromagnetic interference is also set up simultaneously.
In this specification, the utility model is described with reference to its specific embodiment.But should be understood that, obviously, still can make various amendments and conversion and not deviate from spirit and scope of the present utility model.Therefore, specification and accompanying drawing are regarded in an illustrative, rather than a restrictive.
Claims (10)
1. one kind is reduced the switching circuit of electromagnetic interference, comprise respectively and AC power (200), the first terminals L and the second terminals LA that load (300) connects, be connected to the control loop (13) between the first terminals L and the second terminals LA, be connected in series in dynamic stabilized voltage power supply (11) and static stabilized voltage power supply (17) for powering to control loop (13) between the first terminals L and the second terminals LA, and the controllable silicon of being controlled by control loop (13) or the CMOS that are connected in series between the first terminals L and the second terminals LA manage (14), described controllable silicon or CMOS pipe (14) form the electric current major loop of described switching circuit (100), it is characterized in that:
The switching circuit (100) of described reduction electromagnetic interference also comprises that one is incorporated to the coordinated type switching circuit in described electric current major loop, and it comprises the filter network (16) for reducing electromagnetic interference and reacts circuit (15) for controlling this filter network (16) with the interlock of described switching circuit (100) synchronous interaction.
2. the switching circuit of reduction electromagnetic interference according to claim 1; it is characterized in that: described interlock reaction circuit (15) has comprised relay K 1, protection diode D5 and the current-limiting resistance R15 of on/off circuit function; wherein relay K 1 is double-pole or hilted broadsword; the on/off that provides control signal can control the output loop of described filter network (16) to the signal input part (150) of relay K 1, the switching conversion of described filter network (16) is subject to the control of the on/off of described output loop.
3. the switching circuit of reduction electromagnetic interference according to claim 2, it is characterized in that: the signal input part (150) of the relay K 1 of described linked switch circuit interlock reaction circuit (15) is driven by the control signal of the control output end of control loop (13), or the control voltage of the direct-flow positive pole VCC being exported by dynamic stabilized voltage power supply (11) drives, control the on/off of the output loop of described filter network (16), the switching conversion of described filter network (16) is subject to the control of the on/off of described output loop.
4. the switching circuit of reduction electromagnetic interference according to claim 1, is characterized in that: described filter network (16) comprises inductance L 1, capacitor C 5 and/or capacitor C 6; And by one end of one end of described inductance L 1 and described capacitor C 5 structure forming Γ-shape filter network that is connected in parallel; Or by one end of one end of described inductance L 1 and described capacitor C 6 structure forming Γ-shape filter network that is connected in parallel; Or be connected in parallel and by one end of the other end of described inductance L 1 and described capacitor C 6 π shape filter network forming that is connected in parallel by one end of one end of described inductance L 1 and described capacitor C 5.
5. the switching circuit of reduction electromagnetic interference according to claim 1, is characterized in that:
Described coordinated type switching circuit comprises relay K 1, protection diode D5, current-limiting resistance R15, capacitor C 5, resistance R 5, capacitor C 6, resistance R 6 and inductance L 1;
1 pin of described relay K 1, the negative pole of protection diode D5 is connected in parallel with the direct-flow positive pole VCC of dynamic stabilized voltage power supply (11), form 2 pin of relay K 1 of excitation input circuit with 1 pin of relay K 1, the positive pole of protection diode D5 and one end of current-limiting resistance R15 are connected in parallel, the direct current negative pole of the dynamic stabilized voltage power supply of another termination (11) of current-limiting resistance R15, 3 pin of relay K 1 and 4 pin form the first output loop of contact point mode, 9 pin of relay K 1 and 10 pin form the second output loop of contact point mode, described 9 pin, 10 pin and the first terminals L are connected in parallel,
One end of one end of described inductance L 1, one end of capacitor C 5, resistance R 5 and the second terminals LA of described switching circuit are connected in parallel, the other end of inductance L 1, one end of capacitor C 6, one end of resistance R 6 and the major loop of described switching circuit are connected in parallel, 10 pin of the other end of capacitor C 5, the other end of resistance R 5 and relay K 1 are connected in parallel, and 3 pin of the other end of capacitor C 6, the other end of resistance R 6 and relay K 1 are connected in parallel.
6. the switching circuit of reduction electromagnetic interference according to claim 1, is characterized in that:
Described coordinated type switching circuit comprises relay K 1, protection diode D5, current-limiting resistance R15, capacitor C 6, resistance R 6 and inductance L 1;
1 pin of described relay K 1, the negative pole of protection diode D5 are connected in parallel with the direct-flow positive pole VCC of dynamic stabilized voltage power supply (11), forming 2 pin of the relay K 1 of excitation input circuit, the positive pole of protection diode D5 and one end of current-limiting resistance R15 with 1 pin of relay K 1 is connected in parallel, the direct current negative pole of the dynamic stabilized voltage power supply of another termination (11) of current-limiting resistance R15,3 pin of relay K 1 and 4 pin form the first output loop of contact point mode, and described 4 pin are connected with the first terminals L;
The second terminals LA of switching circuit described in one termination of described inductance L 1, the other end of inductance L 1, one end of capacitor C 6, one end of resistance R 6 and the major loop of described switching circuit are connected in parallel, and 3 pin of the other end of capacitor C 6, the other end of resistance R 6 and relay K 1 are connected in parallel.
7. the switching circuit of reduction electromagnetic interference according to claim 1, is characterized in that:
Described coordinated type switching circuit comprises relay K 1, protection diode D5 and current-limiting resistance R15, and described filter network (16) comprises capacitor C 5, resistance R 5 and inductance L 1;
1 pin of described relay K 1, the negative pole of protection diode D5 are connected in parallel with the direct-flow positive pole VCC of dynamic stabilized voltage power supply (11), forming 2 pin of the relay K 1 of excitation input circuit, the positive pole of protection diode D5 and one end of current-limiting resistance R15 with 1 pin of relay K 1 is connected in parallel, the direct current negative pole of the dynamic stabilized voltage power supply of another termination (11) of current-limiting resistance R15,9 pin of relay K 1 and 10 pin form the second output loop of contact point mode, and described 9 pin are connected with the first terminals L;
One end of one end of described inductance L 1, one end of capacitor C 5, resistance R 5 and the second terminals LA of described switching circuit are connected in parallel, the major loop of switching circuit described in another termination of inductance L 1,10 pin of the other end of capacitor C 5, the other end of resistance R 5 and relay K 1 are connected in parallel.
8. according to the switching circuit of the reduction electromagnetic interference described in any one in claim 2,5,6 or 7, it is characterized in that: the control voltage that the direct-flow positive pole VCC of described dynamic stabilized voltage power supply (11) provides is 3V to 48V.
9. the switching circuit of reduction electromagnetic interference according to claim 4, is characterized in that: described filter network (16) also comprises respectively the resistance R 5, the resistance R 6 that are connected in parallel with capacitor C 5, capacitor C 6.
10. the switching circuit of reduction electromagnetic interference according to claim 5, is characterized in that: described resistance R 5, resistance R 6 are respectively 680k Ω; Described capacitor C 5, capacitor C 6 are respectively 0.47 μ F; Described inductance L 1 is 300 μ H.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420383963.XU CN204013453U (en) | 2014-07-11 | 2014-07-11 | A kind of switching circuit that reduces electromagnetic interference |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420383963.XU CN204013453U (en) | 2014-07-11 | 2014-07-11 | A kind of switching circuit that reduces electromagnetic interference |
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|---|---|
| CN204013453U true CN204013453U (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420383963.XU Withdrawn - After Issue CN204013453U (en) | 2014-07-11 | 2014-07-11 | A kind of switching circuit that reduces electromagnetic interference |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104202026A (en) * | 2014-07-11 | 2014-12-10 | 浙江正泰建筑电器有限公司 | Switching circuit capable of reducing electromagnetic interference |
| CN106817018A (en) * | 2015-12-02 | 2017-06-09 | 浙江绍兴苏泊尔生活电器有限公司 | Filter circuit and household appliance |
-
2014
- 2014-07-11 CN CN201420383963.XU patent/CN204013453U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104202026A (en) * | 2014-07-11 | 2014-12-10 | 浙江正泰建筑电器有限公司 | Switching circuit capable of reducing electromagnetic interference |
| CN104202026B (en) * | 2014-07-11 | 2017-08-25 | 浙江正泰建筑电器有限公司 | It is a kind of to reduce the on-off circuit of electromagnetic interference |
| CN106817018A (en) * | 2015-12-02 | 2017-06-09 | 浙江绍兴苏泊尔生活电器有限公司 | Filter circuit and household appliance |
| CN106817018B (en) * | 2015-12-02 | 2020-10-09 | 浙江绍兴苏泊尔生活电器有限公司 | Filter circuit and household appliance |
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Granted publication date: 20141210 Effective date of abandoning: 20170825 |