CN104979851A - Switching circuit and control method thereof - Google Patents
Switching circuit and control method thereof Download PDFInfo
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- CN104979851A CN104979851A CN201510390809.4A CN201510390809A CN104979851A CN 104979851 A CN104979851 A CN 104979851A CN 201510390809 A CN201510390809 A CN 201510390809A CN 104979851 A CN104979851 A CN 104979851A
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- mechanical relay
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/10—Arrangements incorporating converting means for enabling loads to be operated at will from different kinds of power supplies, e.g. from ac or dc
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/175—Indicating the instants of passage of current or voltage through a given value, e.g. passage through zero
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
- H01H9/547—Combinations of mechanical switches and static switches, the latter being controlled by the former
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
- H01H9/548—Electromechanical and static switch connected in series
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K2017/515—Mechanical switches; Electronic switches controlling mechanical switches, e.g. relais
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Keying Circuit Devices (AREA)
- Electronic Switches (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The invention relates to the field of electronic circuits and discloses a switching circuit and a control method thereof. The switching circuit comprises an AC/DC detection circuit, a controller and a hybrid switching circuit. The AC/DC detection circuit is used for detecting whether a power supply is an AC power supply or a DC power supply. The controller is used for controlling the on/off state of the hybrid switching circuit according to the detection result of the AC/DC detection circuit. The hybrid switching circuit is controlled to be switched on/off by the controller to connect the AC power supply/DC power supply with a load. The switching circuit and the control method thereof are applicable to both AC power supplies and DC power supplies.
Description
Technical field
The present invention relates to electronic circuit field, particularly, relate to a kind of switching circuit and control method thereof.
Background technology
Current switching circuit adopts semiconductor power electronic device or adopts mechanical relay to realize.Adopt semiconductor power electronic device can only be used for cut-offfing of DC power supply as the switching circuit of switch, but can not bear the back-pressure of AC power; Although adopt mechanical relay can bear the back-pressure of AC power as the switching circuit of switch, arcing when DC power supply is cut-off effectively can not be tackled.Therefore, when needs compatible with alternating and this two kinds of supply power modes of direct current supply, current switching circuit does not have reply AC power and the ability of cut-offfing of DC power supply concurrently, thus general under being difficult to realize power of alterating and direct current.
Summary of the invention
The object of this invention is to provide a kind of switching circuit and control method thereof, this switching circuit has reply AC power and the ability of cut-offfing of DC power supply concurrently, thus it is general to make can to realize under power of alterating and direct current according to switching circuit of the present invention and control method thereof.
To achieve these goals, the invention provides a kind of switching circuit, this switching circuit comprises: alternating current-direct current testing circuit, is AC power or DC power supply for detecting power supply; Controller, for controlling the break-make of hybrid switch circuit according to the testing result of described alternating current-direct current testing circuit; And described hybrid switch circuit, for break-make under the control of described controller, and have the ability described AC power and described DC power supply being connected to load concurrently.
The present invention also provides a kind of control method of switching circuit, and this control method comprises: detecting power supply is AC power or DC power supply; And the break-make of hybrid switch circuit is controlled according to testing result, wherein said hybrid switch circuit has ability AC power and DC power supply being connected to load concurrently.
Pass through technique scheme, AC power or DC power supply because AC-DC Circuit can detect power supply, hybrid switch circuit has the ability that AC power and DC power supply is connected to load concurrently and can break-make under the control of the controller, therefore, can realize under power of alterating and direct current according to switching circuit of the present invention and control method thereof general.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is the schematic block diagram of the switching circuit according to one embodiment of the present invention;
Fig. 2 is a kind of exemplary circuit diagram of alternating current-direct current testing circuit;
Fig. 3 is a kind of exemplary circuit diagram of hybrid switch circuit;
Fig. 4 is another exemplary circuit diagram of hybrid switch circuit; And
Fig. 5 is the schematic flow sheet of the control method of switching circuit according to one embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
As shown in Figure 1, alternating current-direct current testing circuit 10, controller 20 and hybrid switch circuit 30 is comprised according to the switching circuit of one embodiment of the present invention.Alternating current-direct current testing circuit 10 is AC power or DC power supply for detecting power supply 40; Controller 20, for controlling the break-make of hybrid switch circuit 30 according to the testing result of described alternating current-direct current testing circuit 10; And described hybrid switch circuit 30, for break-make under the control of described controller 10, and have the ability described AC power and described DC power supply being connected to load 50 concurrently.
Alternating current-direct current testing circuit 10 is the circuit of the zero crossing that can detect AC signal, and its implementation can have a variety of, such as, alternating current-direct current testing circuit 10 can be zero cross detection circuit or other forms of alternating current-direct current testing circuit well known to those skilled in the art.And the implementation of zero cross detection circuit also can have a variety of, and wherein a kind of implementation as shown in Figure 2.
Zero cross detection circuit shown in Fig. 2 comprises rectification circuit, resistor RX, resistor RY, optocoupler IC102, resistor R109, resistor R110 and capacitor C3, described rectification circuit is by diode D100, diode D101, diode D103 and diode D104 is formed, resistor RX one end is connected to the plus end of diode D100 and the negative terminal of diode D103, the other end is connected to a lead-out terminal L of described power supply 40 (such as, when power supply 40 is AC power, on the live wire being connected to AC power or zero line), the plus end of diode D101 and the negative terminal of diode D104 are connected to another lead-out terminal N of described power supply 40 (such as, when power supply 40 is AC power, on the zero line being connected to AC power or live wire), the plus end of diode D103 and diode D104 and second terminal of optocoupler IC102 and the 3rd terminal ground, the negative terminal of diode D100 and diode D101 links together and is connected in described load 50 directly or indirectly, resistor RY one end is connected to the negative terminal of diode D103, the other end is connected to the first terminal of optocoupler IC102, resistor R109 one end is connected to the first power supply (on+5V power supply namely illustrated in Fig. 2), the other end is connected to the 4th terminal of optocoupler IC102, resistor R110 one end connects the 4th terminal of optocoupler IC102, the other end is connected to the input (the ZERO terminal namely shown in Fig. 2) of described controller 20, capacitor C3 one end is connected to the input of described controller 20, other end ground connection.
In addition, the rectifier circuit portion in Fig. 2 is only exemplarily, and the rectification circuit of other types well known to those skilled in the art is also feasible.
The operation principle of the zero cross detection circuit shown in Fig. 2 is as follows.When power supply 40 is AC power, when the alternating voltage zero-crossing of AC power, optocoupler IC102 turns off, and the output level of ZERO terminal is high level, and when the alternating voltage of AC power is high, the output level at ZERO terminal place is low level.When power supply 40 is DC power supply, the output level at ZERO terminal place there will not be height change.Like this, by the low and high level change detecting ZERO terminal place, controller 20 just can judge that power supply 40 is AC power or DC power supply.
In addition, mechanical relay and semiconductor power electronic switching device combine by hybrid switch circuit 30, thus both can bear the reverse voltage in AC power situation, can avoid again phenomenon of arc discharge during switching circuit break-make in DC power supply situation.
Fig. 3 shows wherein a kind of exemplary hybrid switch circuit 30.This hybrid switch circuit 30 comprises the first full-control type semiconductor power electronic switching device a, the first mechanical relay b and the second mechanical relay c, and described first full-control type semiconductor power electronic switching device a connects with described second mechanical relay c with after described first mechanical relay b parallel connection.The operation principle of this hybrid switch circuit 30 is as follows:
(1) when described alternating current-direct current testing circuit 10 detects that described power supply 40 is AC power and needs this AC power to be connected to described load 50, described controller 20 first makes described first mechanical relay b adhesive and then makes described second mechanical relay c adhesive.Like this, due to the first mechanical relay b and first mechanical relay b conducting in parallel with the first full-control type semiconductor power electronic switching device a, therefore the first full-control type semiconductor power electronic switching device a is in fact by the short circuit of the first mechanical relay b institute, thus, there is not interchange back-pressure in the first full-control type semiconductor power electronic switching device a, and mechanical relay b and c not easily arcing sintering.
(2) when described alternating current-direct current testing circuit 10 detects that described power supply 40 is AC power and needs to cut off the power supply of described AC power to described load 50, described controller 20 first makes described second mechanical relay c disconnect and then make described first mechanical relay b disconnect.This makes it possible to guarantee that the first mechanical relay b is just disconnected after loop disconnects, because the second mechanical relay c cuts off major loop in this process, therefore when disconnection first mechanical relay b, the first full-control type semiconductor power electronic switching device a two ends do not have voltage, therefore can not there is the possibility of reverse breakdown in the first full-control type semiconductor power electronic switching device a.
(3) when described alternating current-direct current testing circuit 10 detects that described power supply 40 is DC power supply and needs this DC power supply to be connected to described load 50, described controller 20 first makes described second mechanical relay c adhesive and then makes described first full-control type semiconductor power electronic switching device a conducting, and keeps the disconnection of described first mechanical relay b during this period.Like this, in the suction and process of the second mechanical relay c, major loop is in the no current by the state of the first full-control type semiconductor power electronic switching device a disconnection, therefore the second mechanical relay c does not exist the risk of arcing sintering.
(4) when described alternating current-direct current testing circuit 10 detects that described power supply 40 is DC power supply and needs to cut off the power supply of described DC power supply to described load 50, described controller 20 first makes described first full-control type semiconductor power electronic switching device a disconnect and then make described second mechanical relay c disconnect.This makes it possible to guarantee that the second mechanical relay c is just disconnected after major loop disconnects, in the process, because the first full-control type semiconductor power electronic switching device a cuts off major loop, therefore when disconnection second mechanical relay c, second mechanical relay c two ends do not have electric current, therefore the second mechanical relay c can not exist the risk of arcing sintering.
Fig. 4 shows another kind of exemplary hybrid switch circuit 30.This hybrid switch circuit 30 comprises the second full-control type semiconductor power electronic switching device a1, the 3rd full-control type semiconductor power electronic switching device a2 and the 3rd mechanical relay a3, connects after described second full-control type semiconductor power electronic switching device a1 and described 3rd full-control type semiconductor power electronic switching device a2 reverse parallel connection with described 3rd mechanical relay a3.The operation principle of this hybrid switch circuit 30 is as follows:
(1) when described alternating current-direct current testing circuit 10 detects that described power supply 40 is AC power and needs this AC power to be connected to described load 50, described controller 20 first makes described second full-control type semiconductor power electronic switching device a1 and described 3rd full-control type semiconductor power electronic switching device a2 conducting simultaneously, and then makes described 3rd mechanical relay a3 adhesive.Like this, due to the second full-control type semiconductor power electronic switching device a1 and the 3rd full-control type semiconductor power electronic switching device a2 conducting simultaneously, therefore the second full-control type semiconductor power electronic switching device a1 exchanges back-pressure with the 3rd full-control type semiconductor power electronic switching device a2 does not exist.
(2) when described alternating current-direct current testing circuit 10 detects that described power supply 40 is AC power and needs to cut off the power supply of described AC power to described load 50, described controller 20 first makes described 3rd mechanical relay a3 disconnect, and then makes described second full-control type semiconductor power electronic switching device a1 and described 3rd full-control type semiconductor power electronic switching device a2 disconnect.Like this, because the 3rd mechanical relay a3 has formerly cut off major loop, the two ends of therefore the second full-control type semiconductor power electronic switching device a1 and the 3rd full-control type semiconductor power electronic switching device a2 do not have voltage, thus the possibility being reversed and puncturing can not be there is.
(3) when described alternating current-direct current testing circuit 10 detects that described power supply 40 is DC power supply and needs this DC power supply to be connected to described load 50, described controller 20 first makes described 3rd mechanical relay a3 adhesive, and then makes described second full-control type semiconductor power electronic switching device a1 and described 3rd full-control type semiconductor power electronic switching device a2 conducting.Like this, in the suction and process of the 3rd mechanical relay a3, major loop be in by described second full-control type semiconductor power electronic switching device a1 and described 3rd full-control type semiconductor power electronic switching device a2 disconnect state and no current, therefore the 3rd mechanical relay a3 does not exist arcing sintering risk.
(4) when described alternating current-direct current testing circuit 10 detects that described power supply 40 is DC power supply and needs to cut off the power supply of described DC power supply to described load 50, described controller 20 first makes described second full-control type semiconductor power electronic switching device a1 and described 3rd full-control type semiconductor power electronic switching device a2 disconnect, and then makes described 3rd mechanical relay a3 disconnect.This makes it possible to guarantee that the 3rd mechanical relay a3 is just disconnected after major loop disconnects, in the process, because described second full-control type semiconductor power electronic switching device a1 and described 3rd full-control type semiconductor power electronic switching device a2 cuts off major loop, therefore when disconnection the 3rd mechanical relay a3,3rd mechanical relay a3 two ends do not have electric current, therefore the 3rd mechanical relay a3 can not exist the risk of arcing sintering.
Each above-mentioned full-control type semiconductor power electronic switching device can be gate level turn-off thyristor (GTO), electric power bipolar transistor (GTR), power MOS pipe, insulated gate bipolar transistor (IGBT) etc.In addition, in Fig. 3 and Fig. 4, only exemplarily give the grid control mode of each full-control type semiconductor power electronic switching device, but one skilled in the art will appreciate that other control mode is also feasible.
Preferably, described controller 20 can be single-chip microcomputer, and it can also be control unit or the SOC (system on a chip) of other types well known to those skilled in the art.
By adopting switching circuit as above, because mechanical relay and semiconductor power electronic switching device combine by the hybrid switch circuit 30 in this switching circuit, it is AC power or DC power supply that alternating current-direct current testing circuit 10 can detect power supply 40, controller 20 can take corresponding control mode to control the break-make of hybrid switch circuit 30 respectively when AC power and DC power supply, therefore, the switching circuit of AC/DC universal can be realized in relatively inexpensive mode according to switching circuit of the present invention, it both can bear the reverse voltage in ac operation situation, the arcing sintering phenomenon of the contact when break-make in DC operation situation can be avoided again.
The present invention also provides a kind of control method of switching circuit, and this switching circuit can be any one switching circuit as described above, and this control method comprises:
S1, detection power supply are AC power or DC power supply; And
S2, foundation testing result control the break-make of hybrid switch circuit, and wherein hybrid switch circuit has ability AC power and DC power supply being connected to load concurrently.
Wherein, in step sl, AC signal zero crossing point detecting method can be utilized to be AC power or DC power supply to detect power supply.Wherein a kind of AC signal zero crossing point detecting method can adopt the zero cross detection circuit shown in Fig. 2 to realize.Certainly, AC signal zero crossing point detecting method can also adopt the zero-crossing detection circuit of other types well known to those skilled in the art to realize.
Preferably, when hybrid switch circuit is circuit as shown in Figure 3, the control method according to switching circuit of the present invention can comprise the steps:
(1) when detecting that power supply 40 is AC power and needs this AC power to be connected to load 50, first making the first mechanical relay b adhesive and then making the second mechanical relay c adhesive.Like this, due to the first mechanical relay b and first mechanical relay b conducting in parallel with the first full-control type semiconductor power electronic switching device a, therefore the first full-control type semiconductor power electronic switching device a is in fact by the short circuit of the first mechanical relay b institute, thus, there is not interchange back-pressure in the first full-control type semiconductor power electronic switching device a, and mechanical relay b and c not easily arcing sintering;
(2) when detecting that power supply 40 is AC power and needs to cut off the power supply of AC power to load 50, the second mechanical relay c is first made to disconnect and then make described first mechanical relay b disconnect.This makes it possible to guarantee that the first mechanical relay b is just disconnected after loop disconnects, because the second mechanical relay c cuts off major loop in this process, therefore when disconnection first mechanical relay b, the first full-control type semiconductor power electronic switching device a two ends do not have voltage, therefore can not there is the possibility of reverse breakdown in the first full-control type semiconductor power electronic switching device a;
(3) when detecting that power supply 40 is DC power supply and needs this DC power supply to be connected to load 50, first make the second mechanical relay c adhesive and then make the first full-control type semiconductor power electronic switching device a conducting, and keeping the disconnection of described first mechanical relay b during this period.Like this, in the suction and process of the second mechanical relay c, major loop is in the no current by the state of the first full-control type semiconductor power electronic switching device a disconnection, therefore the second mechanical relay c does not exist the risk of arcing sintering; And
(4) when detecting that power supply 40 is DC power supply and needs to cut off the power supply of DC power supply to load 50, the first full-control type semiconductor power electronic switching device a is first made to disconnect and then make described second mechanical relay c disconnect.This makes it possible to guarantee that the second mechanical relay c is just disconnected after major loop disconnects, in the process, because the first full-control type semiconductor power electronic switching device a cuts off major loop, therefore when disconnection second mechanical relay c, second mechanical relay c two ends do not have electric current, therefore the second mechanical relay c can not exist the risk of arcing sintering.
Preferably, when hybrid switch circuit is circuit as shown in Figure 4, the control method according to switching circuit of the present invention can comprise the steps:
(1) when detecting that power supply 40 is AC power and needs this AC power to be connected to load 50, first make the second full-control type semiconductor power electronic switching device a1 and the 3rd full-control type semiconductor power electronic switching device a2 conducting simultaneously, and then make the 3rd mechanical relay a3 adhesive.Like this, due to the second full-control type semiconductor power electronic switching device a1 and the 3rd full-control type semiconductor power electronic switching device a2 conducting simultaneously, therefore the second full-control type semiconductor power electronic switching device a1 exchanges back-pressure with the 3rd full-control type semiconductor power electronic switching device a2 does not exist;
(2) when detecting that power supply 40 is AC power and needs to cut off the power supply of AC power to load 50, first make the 3rd mechanical relay a3 disconnect, and then make the second full-control type semiconductor power electronic switching device a1 and described 3rd full-control type semiconductor power electronic switching device a2 disconnect.Like this, because the 3rd mechanical relay a3 has formerly cut off major loop, the two ends of therefore the second full-control type semiconductor power electronic switching device a1 and the 3rd full-control type semiconductor power electronic switching device a2 do not have voltage, thus the possibility being reversed and puncturing can not be there is;
(3) when detecting that power supply 40 is DC power supply and needs this DC power supply to be connected to load 50, first make the 3rd mechanical relay a3 adhesive, and then make the second full-control type semiconductor power electronic switching device a1 and the 3rd full-control type semiconductor power electronic switching device a2 conducting.Like this, in the suction and process of the 3rd mechanical relay a3, major loop be in by described second full-control type semiconductor power electronic switching device a1 and described 3rd full-control type semiconductor power electronic switching device a2 disconnect state and no current, therefore the 3rd mechanical relay a3 does not exist arcing sintering risk; And
(4) when detecting that power supply 40 is DC power supply and needs to cut off the power supply of DC power supply to load 50, first make the second full-control type semiconductor power electronic switching device a1 and the 3rd full-control type semiconductor power electronic switching device a2 disconnect, and then make the 3rd mechanical relay a3 disconnect.This makes it possible to guarantee that the 3rd mechanical relay a3 is just disconnected after major loop disconnects, in the process, because described second full-control type semiconductor power electronic switching device a1 and described 3rd full-control type semiconductor power electronic switching device a2 cuts off major loop, therefore when disconnection the 3rd mechanical relay a3,3rd mechanical relay a3 two ends do not have electric current, therefore the 3rd mechanical relay a3 can not exist the risk of arcing sintering.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned execution mode; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
In addition, also can carry out combination in any between various different execution mode of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. a switching circuit, this switching circuit comprises:
Alternating current-direct current testing circuit is AC power or DC power supply for detecting power supply;
Controller, for controlling the break-make of hybrid switch circuit according to the testing result of described alternating current-direct current testing circuit; And
Described hybrid switch circuit, for break-make under the control of described controller, and has the ability described AC power and described DC power supply being connected to load concurrently.
2. switching circuit according to claim 1, is characterized in that, described alternating current-direct current testing circuit is the circuit of the zero crossing that can detect AC signal.
3. switching circuit according to claim 1, it is characterized in that, described hybrid switch circuit comprises the first full-control type semiconductor power electronic switching device, the first mechanical relay and the second mechanical relay, and described first full-control type semiconductor power electronic switching device is connected with described second mechanical relay with after described first mechanical relay parallel connection.
4. switching circuit according to claim 3, is characterized in that:
When described alternating current-direct current testing circuit detects that described power supply is AC power and needs this AC power to be connected to described load, described controller first makes described first mechanical relay adhesive and then makes described second mechanical relay adhesive;
When described alternating current-direct current testing circuit detects that described power supply is AC power and needs to cut off the power supply of described AC power to described load, described controller first makes described second mechanical relay disconnect and then makes described first mechanical relay disconnect;
When described alternating current-direct current testing circuit detects that described power supply is DC power supply and needs this DC power supply to be connected to described load, described controller first makes described second mechanical relay adhesive and then makes described first full-control type semiconductor power electronic switching device conducting, and keeps the disconnection of described first mechanical relay during this period; And
When described alternating current-direct current testing circuit detects that described power supply is DC power supply and needs to cut off the power supply of described DC power supply to described load, described controller first makes described first full-control type semiconductor power electronic switching device disconnect and then makes described second mechanical relay disconnect.
5. switching circuit according to claim 1, it is characterized in that, described hybrid switch circuit comprises the second full-control type semiconductor power electronic switching device, the 3rd full-control type semiconductor power electronic switching device and the 3rd mechanical relay, connects after described second full-control type semiconductor power electronic switching device and described 3rd full-control type semiconductor power electronic switching device reverse parallel connection with described 3rd mechanical relay.
6. switching circuit according to claim 5, is characterized in that:
When described alternating current-direct current testing circuit detects that described power supply is AC power and needs this AC power to be connected to described load, described controller first makes described second full-control type semiconductor power electronic switching device and the conducting simultaneously of described 3rd full-control type semiconductor power electronic switching device, and then makes described 3rd mechanical relay adhesive;
When described alternating current-direct current testing circuit detects that described power supply is AC power and needs to cut off the power supply of described AC power to described load, described controller first makes described 3rd mechanical relay disconnect, and then makes described second full-control type semiconductor power electronic switching device and described 3rd full-control type semiconductor power electronic switching device disconnect;
When described alternating current-direct current testing circuit detects that described power supply is DC power supply and needs this DC power supply to be connected to described load, described controller first makes described 3rd mechanical relay adhesive, and then makes described second full-control type semiconductor power electronic switching device and described 3rd full-control type semiconductor power electronic switching device conducting; And
When described alternating current-direct current testing circuit detects that described power supply is DC power supply and needs to cut off the power supply of described DC power supply to described load, described controller first makes described second full-control type semiconductor power electronic switching device and described 3rd full-control type semiconductor power electronic switching device disconnect, and then makes described 3rd mechanical relay disconnect.
7. a control method for switching circuit, this control method comprises:
Detecting power supply is AC power or DC power supply; And
Control the break-make of hybrid switch circuit according to testing result, wherein said hybrid switch circuit has the ability described AC power and described DC power supply being connected to load concurrently.
8. control method according to claim 7, is characterized in that, utilizes AC signal zero crossing point detecting method to be AC power or DC power supply to detect described power supply.
9. control method according to claim 7, it is characterized in that, described hybrid switch circuit comprises the first full-control type semiconductor power electronic switching device, the first mechanical relay and the second mechanical relay, described first full-control type semiconductor power electronic switching device is connected with described second mechanical relay with after described first mechanical relay parallel connection, then:
When detecting that described power supply is AC power and needs this AC power to be connected to described load, first making described first mechanical relay adhesive and then making described second mechanical relay adhesive;
When detecting that described power supply is AC power and needs to cut off the power supply of described AC power to described load, first making described second mechanical relay disconnect and then making described first mechanical relay disconnect;
When detecting that described power supply is DC power supply and needs this DC power supply to be connected to described load, first make described second mechanical relay adhesive and then make described first full-control type semiconductor power electronic switching device conducting, and keeping the disconnection of described first mechanical relay during this period; And
When detecting that described power supply is DC power supply and needs to cut off the power supply of described DC power supply to described load, first making described first full-control type semiconductor power electronic switching device disconnect and then making described second mechanical relay disconnect.
10. control method according to claim 7, it is characterized in that, described hybrid switch circuit comprises the second full-control type semiconductor power electronic switching device, the 3rd full-control type semiconductor power electronic switching device and the 3rd mechanical relay, connect with described 3rd mechanical relay after described second full-control type semiconductor power electronic switching device and described 3rd full-control type semiconductor power electronic switching device reverse parallel connection, then:
When detecting that described power supply is AC power and needs this AC power to be connected to described load, first make described second full-control type semiconductor power electronic switching device and the conducting simultaneously of described 3rd full-control type semiconductor power electronic switching device, and then make described 3rd mechanical relay adhesive;
When detecting that described power supply is AC power and needs to cut off the power supply of described AC power to described load, first make described 3rd mechanical relay disconnect, and then make described second full-control type semiconductor power electronic switching device and described 3rd full-control type semiconductor power electronic switching device disconnect;
When detecting that described power supply is DC power supply and needs this DC power supply to be connected to described load, first make described 3rd mechanical relay adhesive, and then make described second full-control type semiconductor power electronic switching device and described 3rd full-control type semiconductor power electronic switching device conducting; And
When detecting that described power supply is DC power supply and needs to cut off the power supply of described DC power supply to described load, first make described second full-control type semiconductor power electronic switching device and described 3rd full-control type semiconductor power electronic switching device disconnect, and then make described 3rd mechanical relay disconnect.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710156885.8A CN106972740B (en) | 2015-07-03 | 2015-07-03 | A kind of switching circuit and its control method |
| CN201510390809.4A CN104979851B (en) | 2015-07-03 | 2015-07-03 | A kind of on-off circuit and its control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510390809.4A CN104979851B (en) | 2015-07-03 | 2015-07-03 | A kind of on-off circuit and its control method |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710156885.8A Division CN106972740B (en) | 2015-07-03 | 2015-07-03 | A kind of switching circuit and its control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104979851A true CN104979851A (en) | 2015-10-14 |
| CN104979851B CN104979851B (en) | 2018-03-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710156885.8A Expired - Fee Related CN106972740B (en) | 2015-07-03 | 2015-07-03 | A kind of switching circuit and its control method |
| CN201510390809.4A Active CN104979851B (en) | 2015-07-03 | 2015-07-03 | A kind of on-off circuit and its control method |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710156885.8A Expired - Fee Related CN106972740B (en) | 2015-07-03 | 2015-07-03 | A kind of switching circuit and its control method |
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| Country | Link |
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| CN (2) | CN106972740B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108564752A (en) * | 2018-06-15 | 2018-09-21 | 四川艾贝斯科技发展有限公司 | Cable anti-theft system based on NB-IoT and its alarm method |
| CN113556112A (en) * | 2020-04-24 | 2021-10-26 | 贵州振华群英电器有限公司（国营第八九一厂） | Solid relay and application thereof |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110260499B (en) * | 2019-06-13 | 2020-12-25 | 珠海格力电器股份有限公司 | Alternating current signal acquisition device, air conditioner and alternating current signal acquisition method of air conditioner |
| CN111769724A (en) * | 2020-06-23 | 2020-10-13 | 深圳桔子智能科技发展有限公司 | Charging control device and charging device |
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- 2015-07-03 CN CN201710156885.8A patent/CN106972740B/en not_active Expired - Fee Related
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| CN201549395U (en) * | 2009-09-16 | 2010-08-11 | 深圳市英赛威科技有限公司 | Mechanical electronic DC switch |
| CN102842950A (en) * | 2011-06-23 | 2012-12-26 | 北京联动天翼科技有限公司 | Alternating current and direct current power supply switching device |
| CN202153649U (en) * | 2011-07-25 | 2012-02-29 | 中兴通讯股份有限公司 | Communication power supply storage battery access control device |
| CN103247499A (en) * | 2012-02-03 | 2013-08-14 | Abb公司 | Hybrid current switching device |
| CN204741289U (en) * | 2015-07-03 | 2015-11-04 | 广东美的厨房电器制造有限公司 | Switching circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108564752A (en) * | 2018-06-15 | 2018-09-21 | 四川艾贝斯科技发展有限公司 | Cable anti-theft system based on NB-IoT and its alarm method |
| CN113556112A (en) * | 2020-04-24 | 2021-10-26 | 贵州振华群英电器有限公司（国营第八九一厂） | Solid relay and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104979851B (en) | 2018-03-06 |
| CN106972740B (en) | 2019-01-25 |
| CN106972740A (en) | 2017-07-21 |
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