CN102222972A - Switching circuit and power supply device - Google Patents
Switching circuit and power supply device Download PDFInfo
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- CN102222972A CN102222972A CN2011101544184A CN201110154418A CN102222972A CN 102222972 A CN102222972 A CN 102222972A CN 2011101544184 A CN2011101544184 A CN 2011101544184A CN 201110154418 A CN201110154418 A CN 201110154418A CN 102222972 A CN102222972 A CN 102222972A
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Abstract
The invention provides a switching circuit and a power supply device, relating to the field of electronic technology. The invention solves the technical problem existing in prior art that noise immunity test equipment which supplies power to equipment to be tested has complex structure and higher cost. The switching circuit comprises a signal generation module and a switching module, wherein the signal generation module is used for outputting a first signal or not output any signal after being powered on and continuing for a while, and then outputting a second signal continuously within another scheduled time; the switching module is used for receiving the first signal and the second signal, connecting a first input end and a third input end when the first signal is received or no signal is inputted, and connecting a second input end and the third input end when receiving the second signal; at least one of the signal generation module and the switching module is formed by hardware only. The power supply device provided by the invention comprises the switching circuit disclosed by the invention. The switching circuit and the power supply device provided by the invention are used for providing varying voltages such as sag voltage and short supply interruption voltage and the like.
Description
Technical field
The present invention relates to the electromagnetic compatibility test field, be specifically related to a kind of commutation circuit and a kind of electric supply installation that this commutation circuit is set that falls the direct current supply voltage of voltage, variation such as interrupt voltage in short-term for the Devices to test supply temporarily.
Background technology
Along with the continuous development of electronic technology, various Electrical and Electronic equipment emerge in multitudes.Electro Magnetic Compatibility (electromagnetic compatibility, EMC) problem has caused people's attention to the adverse consequences that various Electrical and Electronic equipment cause, the international and domestic numerous and confused corresponding standard of having formulated, regulation Electrical and Electronic equipment must standard compliant Electro Magnetic Compatibility requirement.For whether detecting electric and electronic equipment satisfy the various standards of formulating, the development of EMC test equipment becomes the frontier that scholars study.
A big event of emc testing is exactly that supply power voltage at Electrical and Electronic equipment voltage dip occurs, interrupts in short-term, during change in voltage, the suffered influence of the immunity to interference of detecting electric and electronic equipment (immunity to interference finger device, equipment or systems face electromagnetic disturbance do not reduce the ability of runnability).
Define in the GB, dc supply input mouth voltage dip is meant that the voltage of in the low-voltage direct distribution system certain a bit (being a certain electronic equipment or a certain electronic device) descends suddenly, and experiencing several milliseconds has recovery normal after the of short duration duration of several seconds; Interrupt in short-term being meant that in the low-voltage direct distribution system certain any supply power voltage disappears a period of time (generally being no more than 1 minute), drop range is at least the voltage dip of 80% rated voltage; Change in voltage be meant supply power voltage become gradually be higher or lower than rated voltage (usually above or be lower than rated voltage about 20%), the duration of variation is changeable.
Immunity to interference problem at voltage dip, interruption in short-term and change in voltage, GB Committee has formulated special standard i.e. " immunity experiment of GB17626.29-2006 EMC test and measuring technique dc supply input mouth voltage dip, interruption in short-term and change in voltage ", has stipulated the condition of the needed testing equipment of voltage dip immunity experiment in this standard.
As shown in Figure 1, the existing supply power voltage that is used for detecting electric and electronic equipment voltage dip occurs, interrupts in short-term, the equipment of the situation of change of its immunity to interference during change in voltage, abbreviates immunity experiment equipment as,
Immunity experiment equipment is used to the Devices to test supply to fall voltage, the direct current supply voltage that changes such as interrupt voltage in short-term temporarily.Existing immunity experiment equipment is made of the functional module that is mounted with software program (for example chip such as FPGA, single-chip microcomputer), and the mode that loads on the parameter size of the software program in the functional module by change is controlled the voltage swing of immunity experiment equipment input Devices to test and the duration of input voltage;
When using immunity experiment equipment to power as Devices to test, when the ruuning situation of operating personnel by the observation Devices to test detects the Devices to test supply power voltage and voltage dip, short time voltage interruption etc. occur and change, the immunity to interference of Devices to test.
The inventor finds that there is following technical problem at least in prior art in realizing process of the present invention:
Because in the prior art, immunity experiment equipment is by the functional module that is mounted with software program (FPGA for example, chips such as single-chip microcomputer) constitute, the mode that loads on the parameter size of the software program in the functional module by change is controlled the voltage swing of immunity experiment equipment input Devices to test and the duration of input voltage, so before this immunity experiment equipment of use, at first to work out, load the software program of arranging in pairs or groups mutually with functional module, establishment, the process complexity of load software program, need expend a large amount of manpowers, financial resources, simultaneously, the functional module that is mounted with software need possess powerful data-handling capacity usually, so complex structure not only, and cost is also than higher, finally cause in the prior art immunity experiment device structure complexity, and cost is than higher for the Devices to test power supply.
Summary of the invention
The embodiment of the invention provides a kind of commutation circuit and a kind of electric supply installation that this commutation circuit is set, and solved prior art and existed for the immunity experiment device structure complexity that Devices to test is powered, and cost compares technical problems of high.
For achieving the above object, embodiments of the invention adopt following technical scheme:
The commutation circuit that the embodiment of the invention provided comprises first incoming end, second incoming end, signal generating module, handover module, the 3rd incoming end and supply module, wherein:
Described signal generating module is used for exporting first signal earlier or do not export any signal earlier after energising, and after continuing for some time, continues the output secondary signal in the period at another predetermined section;
Described handover module, be used to receive described first signal and described secondary signal, and when receiving described first signal or importing without any signal, described first incoming end is linked to each other with described the 3rd incoming end, when receiving described secondary signal, described second incoming end is linked to each other with described the 3rd incoming end;
Described supply module is used to the power supply of described signal generating module and described handover module;
One of them only is made of hardware at least for described signal generating module and described handover module.
The electric supply installation that the embodiment of the invention provided comprises the commutation circuit that first DC power supply, second DC power supply and the invention described above embodiment are provided, wherein:
Described first DC power supply links to each other with described first incoming end, and described second DC power supply links to each other with described second incoming end;
Described first DC power supply is used for the electric energy that to described first incoming end input meets the rated voltage of Devices to test;
Described second DC power supply is used for the electric energy that to described second incoming end input is greater than or less than the rated voltage of described Devices to test;
Described the 3rd incoming end links to each other with Devices to test, is used to described Devices to test power supply.
Compared with prior art, the arbitrary technical scheme in the technique scheme provided by the present invention has following advantage:
In the commutation circuit that the embodiment of the invention provided, signal generating module can be exported first signal earlier or not export earlier any signal after energising, and after continuing for some time, continue the output secondary signal in period at another predetermined section, handover module, can be when receiving first signal or importing without any signal, first incoming end is linked to each other with the 3rd incoming end, when receiving secondary signal, second incoming end is linked to each other with the 3rd incoming end, this shows, can continue the mode of the time of output secondary signal in the embodiment of the invention by setting signal generation module, control the time that second incoming end and the 3rd incoming end keep linking to each other state, so when the 3rd incoming end links to each other with Devices to test, be used to the Devices to test power supply, first DC power supply is used for the input of first incoming end is met the electric energy of the rated voltage of Devices to test, when second DC power supply is used for that second incoming end input is greater than or less than the electric energy of rated voltage of Devices to test, can continue the mode of the time of output secondary signal by setting signal generation module, controlling second DC power supply provides the time of the electric energy of the rated voltage that is greater than or less than Devices to test for Devices to test, so can be that voltage falls in Devices to test supply temporarily with the preset time, the direct current supply voltage that changes such as interrupt voltage in short-term, and then can realize test to Devices to test;
Because one of them only is made of hardware at least for signal generating module and handover module in the embodiment of the invention commutation circuit, that is to say that constituting one of them hardware of signal generating module and handover module at least need not the load software program, so not only saved establishment, the manpower that the load software program is spent, financial resources, and, the hardware that need not the load software program need not to possess data-handling capacity, so its structure also can be simply a lot of with respect to the functional module that needs the load software program, cost also can be far below the functional module that needs the load software program, and then the commutation circuit of this signal generating module and handover module is set, the structure of electric supply installation is also more simple with respect to the immunity experiment equipment that the functional module that is mounted with software is set in the prior art, cost is also lower, exist for the immunity experiment device structure complexity that Devices to test is powered so solved prior art, and cost compares technical problems of high.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the annexation schematic diagram between immunity experiment equipment and the Devices to test in the prior art;
The schematic flow sheet of a kind of execution mode of the commutation circuit that Fig. 2 is provided for the embodiment of the invention 1;
The schematic flow sheet of another execution mode of the commutation circuit that Fig. 3 is provided for the embodiment of the invention 1;
Fig. 4 is each part of inside of signal generating module in Fig. 2 or the commutation circuit shown in Figure 3 and the schematic diagram of the annexation between the switch module;
Fig. 5 is the schematic diagram that the inside of handover module in Fig. 2 or the commutation circuit shown in Figure 3 is formed;
Fig. 6 is the schematic diagram of the waveform of the signal that comparison output, the first drive signal output and the second drive signal output are exported among Fig. 5;
Fig. 7 is the electric supply installation that the embodiment of the invention provided and the schematic diagram of the annexation between the Devices to test.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
The embodiment of the invention provide a kind of simple in structure, cost is low and the commutation circuit of easy connection and electric supply installation that this commutation circuit is set.
As shown in Figure 2, the commutation circuit that the embodiment of the invention provided comprises the first incoming end IN1, the second incoming end IN2, signal generating module 1, handover module 3, the 3rd incoming end IN3 and supply module Vcc, wherein:
Signal generating module 1 is used for exporting first signal earlier or do not export any signal earlier after energising, and after continuing for some time, continues the output secondary signal in the period at another predetermined section;
Supply module Vcc is used to signal generating module 1 and handover module 3 power supplies;
One of them only is made of hardware at least for signal generating module 1 and handover module 3.
In the commutation circuit that the embodiment of the invention provided, signal generating module 1 can be exported first signal earlier or not export earlier any signal after energising, and after continuing for some time, continue the output secondary signal in period at another predetermined section, handover module 3, can receive first signal and secondary signal, and when receiving first signal or importing without any signal, the first incoming end IN1 is linked to each other with the 3rd incoming end IN3, when receiving secondary signal, the second incoming end IN2 is linked to each other with the 3rd incoming end IN3, this shows, can continue the mode of the time of output secondary signal in the embodiment of the invention by setting signal generation module 1, control the time that the second incoming end IN2 and the 3rd incoming end IN3 keep linking to each other state.
In the present embodiment signal generating module 1 and handover module 3 both can all only constitute by hardware, both also can one of them only be made of hardware, and wherein another is made of the hardware that is mounted with software program (for example FPGA, single-chip microcomputer etc.), be preferably: both all only are made of signal generating module 1 and handover module 3 hardware, cost that like this can more efficiently reduction commutation circuit of the present invention.
As shown in Figure 3, commutation circuit in the present embodiment, also comprise the switch module 2 that is connected between signal generating module 1 and the handover module 3, switch module 2, be used for when being triggered, make first signal and the secondary signal of signal generating module 1 output transfer to handover module 3, also be used for when not being triggered, do not make any signal transfer to handover module 3 or only make first signal transfer to handover module 3.
When switch module 2 is not triggered, the path that is used to transmit first signal and secondary signal between signal generating module 1 and the handover module 3 is a ground connection, this moment, first signal and secondary signal were imported ground into, so first signal and the secondary signal of signal generating module 1 output can't enter handover module 3, at this moment, the path ground that is used to transmit first signal and secondary signal between signal generating module 1 and the handover module 3, can be considered the low level signal that is that enters handover module 3, after the trigger switch module 2, the path conducting that is used to transmit first signal and secondary signal between signal generating module 1 and the handover module 3 is ground connection no longer, first signal and secondary signal enter handover module 3, so can be after signal generating module 1 energising, the mode of trigger switch module 2 by whether, control first signal and secondary signal and whether enter handover module 3, and then whether control handover module 3 carries out switch operating, as seen, switch module 2 is provided with the controllability that has strengthened the present embodiment commutation circuit.
Hardware comprises wherein one or more of diode, triode, electric capacity, metal-oxide-semiconductor, resistance and lead in the present embodiment.Above device is the electronic devices and components of the load software program that need not, with low cost and easy connection, the suitable cost that is applied to reduce the commutation circuit that the embodiment of the invention provides.
As shown in Figure 4, signal generating module 1 comprises the first voltage input end Vcc1, timing unit 11 and comparing unit 12 in the present embodiment, wherein:
Comparing unit 12, when being used in the range of voltage values under magnitude of voltage increasing voltage size belongs to predefined first signal, export first signal, and in the range of voltage values under magnitude of voltage increasing voltage size belongs to predefined secondary signal the time, the output secondary signal.
The first voltage input end Vcc1 is preferably the constant voltage of timing unit 11 input voltage values, because timing unit 11 is exported the electric energy that obtains in the mode of output voltage values increasing voltage, simultaneously, range of voltage values under first signal and the secondary signal is predefined, like this, can change on the one hand first signal and time that secondary signal continued by the mode that changes the cumulative speed of timing unit 11 output voltage values, for example can reduce the cumulative speed of timing unit 11 output voltage values, thereby prolong first signal and time that secondary signal continued, on the other hand, can change first signal and time that secondary signal continued by the mode that changes the range of voltage values under first signal and the secondary signal, for example increase the affiliated range of voltage values of secondary signal, thereby prolong the time that secondary signal continued.
The positive pole of capacitor C links to each other the minus earth of capacitor C by charging resistor Rc with the first voltage input end Vcc1;
Timing output Out1 links to each other with the positive pole and the comparing unit 12 of capacitor C respectively.
Charging resistor Rc, capacitor C are electronic devices and components with low cost, easy connection.Capacitor C can be stored the electric energy by first voltage input end Vcc1 input, capacitor C is in the process of charging, along with its positive pole of increase in charging interval and the voltage between the negative pole also can raise gradually, and then the voltage of timing output Out1 output also can raise gradually, finally can reach a constant peak.The time of capacitor C charging equals the product of resistance value and the capacitor C appearance value of charging resistor Rc, this shows, can all can prolong the charging interval by method that increases charging resistor Rc resistance value or the method that increases capacitor C appearance value, and then can prolong first signal and time that secondary signal continued.
In the present embodiment comparing unit 12 comprise comparison subelement 121, high voltage incoming end 122, wait to declare voltage incoming end 123, low voltage incoming end 124 and output Out2 relatively, wherein:
The voltage of high voltage incoming end 122 inputs is higher than the voltage of low voltage incoming end 124 inputs;
Wait to declare voltage incoming end 123 and link to each other, be used to receive the magnitude of voltage increasing voltage of timing unit 11 outputs with timing unit 11;
Compare subelement 121, be used in the size of magnitude of voltage increasing voltage output secondary signal during between voltage that high voltage incoming end 122 and low voltage incoming end 124 are imported, export first signal when output voltage values increasing voltage or the magnitude of voltage increasing voltage exported be not less than the voltage of low voltage incoming end 124 inputs or greater than the voltage of high voltage incoming end 122 inputs at timing unit 11.
Because the voltage that timing output Out1 is exported is cumulative, the size of the magnitude of voltage that timing output Out1 is exported is directly proportional with the length of time, so after the cumulative speed of the range of voltage values under first signal and the secondary signal, the magnitude of voltage that timing output Out1 exported was determined well, first signal and the time that secondary signal continued had also just been decided.
The voltage that high voltage incoming end 122 and low voltage incoming end 124 are imported is the reference voltage of comparison subelement 121, relatively subelement 121 with reference voltage with wait to declare the voltage that voltage incoming end 123 imported and compare, and judge it is output first signal, or secondary signal according to comparing result.
First signal is a low level signal in the present embodiment, and secondary signal is a high level signal, and relatively subelement 121 comprises first comparator C 1 and second comparator C 2, wherein:
The positive pole of first comparator C 1 links to each other with high voltage incoming end 122;
The positive pole of the negative pole of first comparator C 1 and second comparator C 2 all with wait that declaring voltage incoming end 123 links to each other;
The negative pole of second comparator C 2 links to each other with low voltage incoming end 124;
Link to each other with comparison output Out2 after the output parallel connection of the output of first comparator C 1 and second comparator C 2.
Comparator is to be exclusively used in the circuit that an analog voltage signal is compared with a reference voltage, ripe, the with low cost advantage that possesses skills, suitable being applied in the present embodiment.Certainly, comparing subelement 121 in the present embodiment also can be made of other electronic devices and components outside the comparator.
As shown in Figure 4, switch module 2 in the present embodiment, comprise the first end K1, the second end K2, the 3rd end K3 and the 4th end K4, wherein:
The first end K1 links to each other with timing output Out1, the 3rd end K3 links to each other with comparison output Out2, the second end K2 and the equal ground connection of the 4th end K4, and when switch module 2 is triggered, the first end K1 and the second end K2 disconnect, and the 3rd end K3 and the 4th end K4 disconnect, when switch module 2 is not triggered, the first end K1 and the second end K2 conducting, the 3rd end K3 and the 4th end K4 conducting.
Initial condition promptly rigidly connects energize, but not during trigger switch module 2, the first end K1 and the second end K2 conducting, the 3rd end K3 and the 4th end K4 conducting, at this moment, timing output Out1 and the equal ground connection of comparison output Out2, so do not have signal from timing output Out1 and comparison output Out2 output, perhaps, timing output Out1 and comparison output Out2 output can be considered as low level signal, even being considered as low level signal all is the same with the result who is considered as not having any signal input, handover module 3 all can make the first incoming end IN1 link to each other with the 3rd incoming end IN3, then, trigger switch module 2, at this moment, timing output Out1 and comparison output Out2 be ground connection no longer all, the increasing voltage of timing output Out1 output is input to waits to declare voltage incoming end 123, and relatively subelement 121 just can compare work afterwards.
As shown in Figure 5, handover module 3 in the present embodiment, comprise control unit 31 and switch unit 32, wherein:
The effect of control unit 31 is: can realize receiving a signal, reach the control to two paths.
The 3rd signal and the 6th signal are high level signal in the present embodiment, and the 4th signal and the 5th signal are low level signal, wherein:
The base stage of the first triode T1 links to each other with comparison output Out2, its grounded emitter, and its collector electrode links to each other with the base stage of the second voltage input end Vcc2, the first drive signal output 311 and the second triode T2 respectively;
The collector electrode of the second triode T2 links to each other with the second voltage input end Vcc2, the second drive signal output 312 respectively, its grounded emitter.
The waveform of the signal that comparison output Out2, the first drive signal output 311 and the second drive signal output 312 are exported as shown in Figure 6, T represents the duration of secondary signal among Fig. 6, and the signal of waveform concrete process that produces in control unit 31 is as follows as shown in Figure 6:
When relatively output Out2 exports first signal, because first signal is a low level signal, at this moment, the first triode T1 ends, the first drive signal output 311 links to each other with the second voltage input end Vcc2, because the voltage of second voltage input end Vcc2 input is from 311 outputs of the first drive signal output, so the first drive signal output, 311 output high level signals, simultaneously, the second triode T2 conducting, the second drive signal output, 312 ground connection, the second drive signal output, 312 output low level signals;
Otherwise, when relatively output Out2 exports secondary signal, because secondary signal is a high level signal, at this moment, the first triode T1 conducting, the first drive signal output, 311 ground connection, the first drive signal output, 311 output low level signals, simultaneously, the second triode T2 ends, the second drive signal output 312 links to each other with the second voltage input end Vcc2, because the voltage of second voltage input end Vcc2 input is from 312 outputs of the second drive signal output, so the second drive signal output, 312 output high level signals.
The grid of the first metal-oxide-semiconductor M1 links to each other with the tertiary voltage input Vcc3 and the first drive signal output 311 respectively, and the source electrode of the first metal-oxide-semiconductor M1 links to each other with the ground and the first incoming end IN1 respectively, and the drain electrode of the first metal-oxide-semiconductor M1 links to each other with the 3rd incoming end;
The grid of the second metal-oxide-semiconductor M2 links to each other with the 4th voltage input end Vcc4 and the second drive signal output 312 respectively, and the source electrode of the second metal-oxide-semiconductor M2 links to each other with the ground and the second incoming end IN2 respectively, and the drain electrode of the second metal-oxide-semiconductor M1 links to each other with the 3rd incoming end.
When the first drive signal output, 311 outputs the 3rd signal, during the second drive signal output, 312 outputs the 4th signal, the first metal-oxide-semiconductor M1 conducting, path conducting between the first incoming end IN1 and the 3rd incoming end IN3, so the first incoming end IN1 links to each other with the 3rd incoming end IN3, simultaneously, the second metal-oxide-semiconductor M2 ends, so the second incoming end IN2 and the 3rd incoming end IN3 disconnect;
Otherwise, the first drive signal output, 311 outputs the 5th signal, during the second drive signal output, 312 outputs the 6th signal, the first metal-oxide-semiconductor M1 ends, and the path between the first incoming end IN1 and the 3rd incoming end IN3 disconnects, so the first incoming end IN1 and the 3rd incoming end IN3 disconnect, simultaneously, the second metal-oxide-semiconductor M2 conducting, the path conducting between the second incoming end IN2 and the 3rd incoming end IN3 is so the second incoming end IN2 links to each other with the 3rd incoming end IN3.
Supply module Vcc in the present embodiment is used to the first voltage input end Vcc1, the second voltage input end Vcc2, tertiary voltage input Vcc3, the 4th voltage input end Vcc4, high voltage incoming end 122 and the constant voltage of low voltage incoming end 124 input voltage values.
When the constant voltage of the first voltage input end Vcc1, the second voltage input end Vcc2, tertiary voltage input Vcc3, the 4th voltage input end Vcc4, high voltage incoming end 122 and low voltage incoming end 124 input voltage values, in the circuit each electronic devices and components operation can be more steady, reliably.
Certainly, the first voltage input end Vcc1, the second voltage input end Vcc2, tertiary voltage input Vcc3, the 4th voltage input end Vcc4, high voltage incoming end 122 and low voltage incoming end 124 also can use different electric supply installations to be the constant voltage of its supply magnitude of voltage respectively in the present embodiment.
Also be connected with the first isolating device VD1 between the drain electrode of the first metal-oxide-semiconductor M1 and the 3rd incoming end IN3 in the present embodiment, and/or, also be connected with the second isolating device VD2 between the drain electrode of the second metal-oxide-semiconductor M2 and the 3rd incoming end IN3, wherein:
The first isolating device VD1 is used to stop that the electric current that flows through the second incoming end IN2 and the 3rd incoming end IN3 flows into the drain electrode of the first metal-oxide-semiconductor M1;
The second isolating device VD2 is used to stop that the electric current that flows through the first incoming end IN1 and the 3rd incoming end IN3 flows into the drain electrode of the second metal-oxide-semiconductor M2.
The electric current that the first isolating device VD1 and the second isolating device VD2 can avoid flowing through the first incoming end IN1 and the 3rd incoming end IN3 flows into the second incoming end IN2, the electronic devices and components that cause being connected between the second incoming end IN2 and the 3rd incoming end IN3 damage, the electric current that also can avoid flowing through the second incoming end IN2 and the 3rd incoming end IN3 flows into the first incoming end IN1, the electronic devices and components that cause being connected between the first incoming end IN1 and the 3rd incoming end IN3 damage, thus the reliability and the life-span of improving the present embodiment commutation circuit.
The first isolating device VD1 and/or the second isolating device VD2 are isolating diode in the present embodiment.Isolating diode has with low cost, advantage easy to connect.
Commutation circuit in the present embodiment, also comprise state indicating module 4, state indicating module 4, the 3rd incoming end IN3 links to each other with the second incoming end IN2 to be used for indicating the 3rd incoming end IN3 to link to each other still with the first incoming end IN1 by the mode of emission light, blow a whistle (for example voice broadcast), jingle bell or vibration.
Operating personnel can be according to indicated result, in time understanding which bar path of commutation circuit connects, know between the 3rd incoming end IN3 and the first incoming end IN1 and the annexation between the 3rd incoming end IN3 and the second incoming end IN2, and then when the present embodiment commutation circuit was applied to Devices to test 6 power supplies, operating personnel can in time test the Devices to test 6 that relies on the 3rd incoming end IN3 power supply.When state indicating module in the present embodiment 4 uses the mode of jingle bells or vibration to indicate the 3rd incoming end IN3 to link to each other with the first incoming end IN1 still to be the 3rd incoming end IN3 to link to each other with the second incoming end IN2, the tinkle of bells of being play when linking to each other with the second incoming end IN2 with the 3rd incoming end IN3 when the 3rd incoming end IN3 links to each other with the first incoming end IN1, the frequency of being vibrated can difference also can be identical, for example: the 3rd incoming end IN3 links to each other with the first incoming end IN1, and when disconnecting, the 3rd incoming end IN3 and the second incoming end IN2 play the A the tinkle of bells, the 3rd incoming end IN3 and the first incoming end IN1 disconnect, and the 3rd incoming end IN3 broadcast B the tinkle of bells when linking to each other with the second incoming end IN2.
As shown in Figure 5, state indicating module 4 comprises first fluorescent tube 41 and second fluorescent tube 42 in the present embodiment, wherein:
First fluorescent tube 41 is connected between the grid and ground of the first metal-oxide-semiconductor M1;
First fluorescent tube 41 and second fluorescent tube 42 all can indicate the 3rd incoming end IN3 to link to each other still with the first incoming end IN1 by the mode of emission light, and the 3rd incoming end IN3 links to each other with the second incoming end IN2.The mode of emission light has intuitive, clear, and the fast advantage of reaction speed.
First fluorescent tube 41 and second fluorescent tube 42 are preferably the LED lamp in the present embodiment, and the LED light fixture has the advantage that power consumption is little, cost is low, and certainly, first fluorescent tube 41 and second fluorescent tube 42 also can use other emitting components.
Also be connected with the first voltage-stabiliser tube G1 in the present embodiment between first fluorescent tube 41 and the ground, also be connected with the second voltage-stabiliser tube G2 between second fluorescent tube 42 and the ground.The first voltage-stabiliser tube G1 and the second voltage-stabiliser tube G2 can play and keep voltage constant on the LED lamp, and then guarantee the constant effect of LED lamp luminosity.
As shown in Figure 7, the electric supply installation that the embodiment of the invention provided comprises the commutation circuit that first DC power supply 51, second DC power supply 52 and the invention described above embodiment are provided, wherein:
First DC power supply 51 links to each other with the first incoming end IN1, and second DC power supply 52 links to each other with the second incoming end IN2;
First DC power supply 51 is used for first incoming end IN1 input is met the electric energy of the rated voltage of Devices to test 6;
Second DC power supply 52 is used for second incoming end IN2 input is greater than or less than the electric energy of the rated voltage of Devices to test 6;
The 3rd incoming end IN3 links to each other with Devices to test 6, is used to Devices to test 6 power supplies.
When the 3rd incoming end IN3 links to each other with Devices to test 6 as shown in Figure 7, be used to Devices to test 6 power supplies, first DC power supply 51 is used for the first incoming end IN1 is imported the electric energy of the rated voltage that meets Devices to test 6, when second DC power supply 52 is used for that second incoming end IN2 input is greater than or less than the electric energy of rated voltage of Devices to test 6, can continue the mode of the time of output secondary signal by setting signal generation module 1, controlling second DC power supply 52 provides the time of the electric energy of the rated voltage that is greater than or less than Devices to test 6 for Devices to test 6, so can be that voltage falls in Devices to test 6 supplies temporarily with the preset time, the direct current supply voltage that changes such as interrupt voltage in short-term, and then can realize test to Devices to test 6;
Because one of them only is made of hardware at least for signal generating module 1 and handover module 3 in the embodiment of the invention commutation circuit, that is to say that constituting one of them hardware of signal generating module 1 and handover module 3 at least need not the load software program, so not only saved establishment, the manpower that the load software program is spent, financial resources, and, the hardware that need not the load software program need not to possess data-handling capacity, so its structure also can be simply a lot of with respect to the functional module that needs the load software program, cost also can be far below the functional module that needs the load software program, and then the commutation circuit of this signal generating module 1 and handover module 3 is set, the structure of electric supply installation is also more simple with respect to the immunity experiment equipment that the functional module that is mounted with software is set in the prior art, cost is also lower, exist for the immunity experiment device structure complexity that Devices to test 6 is powered so solved prior art, and cost compares technical problems of high.
Therefore, because the electric supply installation that the embodiment of the invention provided has identical technical characterictic with the commutation circuit that the invention described above embodiment is provided, so also can obtain identical technique effect, the identical technical problem of solution.
Can prepare different a plurality of second DC power supply 52 as shown in Figure 7 of output voltage in the present embodiment, like this, after using 6 tests (for example test falls in supply power voltage temporarily) of 52 pairs of Devices to tests of one of them second DC power supply to finish, can switch 52 pairs of Devices to tests 6 of another second DC power supply and proceed test (for example power interrupt test in short-term or supply power voltage change test).
In the present embodiment as shown in Figure 7 the first incoming end IN1 be preferably with the negative pole of first DC power supply 51 link to each other, the second incoming end IN2 is preferably links to each other with the negative pole of second DC power supply 52, the 3rd incoming end IN3 is preferably with the negative pole of Devices to test 6 and links to each other, and the positive pole of Devices to test 6 is preferably respectively and links to each other with the positive pole of first DC power supply 51, the positive pole of second DC power supply 52.Facts have proved: the loop that this connected mode constituted, the electric current of process electronic devices and components is a negative current, helps prolonging the useful life of electronic devices and components.
The commutation circuit that above-mentioned present embodiment provided can also be applied in other test circuits outside the electric supply installation, for example: can insert the power supply (for example Switching Power Supply) that to export constant voltage at the 3rd incoming end IN3 as shown in Figure 7, connect different loads respectively at the first incoming end IN1 and the second incoming end IN2 then, thus the ruuning situation when testing different loads and inserting same power supply.Certainly, the commutation circuit that above-mentioned present embodiment provided can also be applied in other circuit outside the above cited test circuit.
The above; only be the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (10)
1. a commutation circuit is characterized in that, comprises first incoming end, second incoming end, signal generating module, handover module, the 3rd incoming end and supply module, wherein:
Described signal generating module is used for exporting first signal earlier or do not export any signal earlier after energising, and after continuing for some time, continues the output secondary signal in the period at another predetermined section;
Described handover module, be used to receive described first signal and described secondary signal, and when receiving described first signal or importing without any signal, described first incoming end is linked to each other with described the 3rd incoming end, when receiving described secondary signal, described second incoming end is linked to each other with described the 3rd incoming end;
Described supply module is used to the power supply of described signal generating module and described handover module;
One of them only is made of hardware at least for described signal generating module and described handover module.
2. commutation circuit according to claim 1, it is characterized in that, this commutation circuit, also comprise the switch module that is connected between described signal generating module and the described handover module, described switch module is used for when being triggered, and makes described first signal and the described secondary signal of described signal generating module output transfer to described handover module, also be used for when not being triggered, do not make any signal transfer to described handover module or only make described first signal transfer to described handover module.
3. commutation circuit according to claim 2 is characterized in that described signal generating module comprises first voltage input end, timing unit and comparing unit, wherein:
Described timing unit is used for obtaining electric energy from described first voltage input end, then the described electric energy output that will obtain in the mode of output voltage values increasing voltage;
Described comparing unit, when being used in the range of voltage values under described magnitude of voltage increasing voltage size belongs to predefined described first signal, export described first signal, and in the range of voltage values under described magnitude of voltage increasing voltage size belongs to predefined described secondary signal the time, export described secondary signal.
4. commutation circuit according to claim 3 is characterized in that, described timing unit comprises charging resistor, electric capacity and timing output, wherein:
The positive pole of described electric capacity links to each other the minus earth of described electric capacity by described charging resistor with described first voltage input end;
Described timing output links to each other with the anodal and described comparing unit of described electric capacity respectively;
And/or described comparing unit comprises comparison subelement, high voltage incoming end, waits to declare the voltage incoming end, low voltage incoming end and comparison output, wherein:
The voltage of described high voltage incoming end input is higher than the voltage of described low voltage incoming end input;
Describedly wait to declare the voltage incoming end and link to each other, be used to receive the described magnitude of voltage increasing voltage of described timing unit output with described timing unit;
Described relatively subelement, be used for exporting described secondary signal during between voltage that described high voltage incoming end and described low voltage incoming end are imported, do not export described magnitude of voltage increasing voltage or the described magnitude of voltage increasing voltage exported is exported described first signal during less than the voltage of described low voltage incoming end input or greater than the voltage of described high voltage incoming end input at described timing unit in the size of described magnitude of voltage increasing voltage.
5. commutation circuit according to claim 4 is characterized in that, described first signal is a low level signal, and described secondary signal is a high level signal, and described relatively subelement comprises first comparator and second comparator, wherein:
The positive pole of described first comparator links to each other with described high voltage incoming end;
The positive pole of the negative pole of described first comparator and described second comparator is all waited to declare the voltage incoming end and is linked to each other with described;
The negative pole of described second comparator links to each other with described low voltage incoming end;
Link to each other with described relatively output after the output parallel connection of the output of described first comparator and described second comparator;
Described switch module comprises first end, second end, the 3rd end and the 4th end, wherein:
Described first end links to each other with described timing output, described the 3rd end links to each other with described relatively output, described second end and the equal ground connection of described the 4th end, and when described switch module is triggered, described first end and second end disconnect, and described the 3rd end and described the 4th end disconnect, when described switch module is not triggered, described first end and the described second end conducting, described the 3rd end and described the 4th end conducting.
6. commutation circuit according to claim 5 is characterized in that, described handover module comprises control unit and switch unit, wherein:
Described control unit links to each other with described switch unit by the first drive signal output and the second drive signal output respectively;
Described control unit, be used for when receiving described first signal, export the 3rd signal from the first drive signal output, export the 4th signal from the second drive signal output, when receiving described secondary signal, export the 5th signal from the first drive signal output, export the 6th signal from the second drive signal output;
Described switch unit, be used for when receiving described the 3rd signal and described the 4th signal, described first incoming end is linked to each other with described the 3rd incoming end, described second incoming end and described the 3rd incoming end are disconnected, when receiving described the 5th signal and described the 6th signal, described first incoming end and described the 3rd incoming end are disconnected, described second incoming end is linked to each other with described the 3rd incoming end.
7. commutation circuit according to claim 6 is characterized in that, described the 3rd signal and described the 6th signal are high level signal, and described the 4th signal and described the 5th signal are low level signal, wherein:
Described control unit comprises first triode, second triode and second voltage input end;
The base stage of described first triode links to each other with described relatively output, its grounded emitter, and its collector electrode links to each other with the base stage of described second voltage input end, the described first drive signal output and described second triode respectively;
The collector electrode of described second triode links to each other its grounded emitter with described second voltage input end, the described second drive signal output respectively;
And/or described switch unit comprises first metal-oxide-semiconductor, second metal-oxide-semiconductor, tertiary voltage input and the 4th voltage input end, wherein:
The grid of described first metal-oxide-semiconductor links to each other with described tertiary voltage input and the described first drive signal output respectively, and its source electrode links to each other with ground and described first incoming end respectively, and its drain electrode links to each other with described the 3rd incoming end;
The grid of described second metal-oxide-semiconductor links to each other with described the 4th voltage input end and the described second drive signal output respectively, and its source electrode links to each other with ground and described second incoming end respectively, and its drain electrode links to each other with described the 3rd incoming end.
8. commutation circuit according to claim 7, it is characterized in that, described supply module is used to described first voltage input end, described second voltage input end, described tertiary voltage input, described the 4th voltage input end, described high voltage incoming end and the constant voltage of described low voltage incoming end input voltage value;
And/or, this commutation circuit, also comprise the state indicating module, described state indicating module is used for by emission light, blows a whistle, to indicate described the 3rd incoming end to link to each other with described first incoming end still be that described the 3rd incoming end links to each other with described second incoming end for the mode of jingle bell or vibration;
And/or, also be connected with between the drain electrode of described first metal-oxide-semiconductor and described the 3rd incoming end between the drain electrode of first isolating device and/or described second metal-oxide-semiconductor and described the 3rd incoming end and also be connected with described second isolating device, wherein:
Described first isolating device is used to stop that the electric current that flows through described second incoming end and described the 3rd incoming end flows into the drain electrode of described first metal-oxide-semiconductor;
Described second isolating device is used to stop that the electric current that flows through described first incoming end and described the 3rd incoming end flows into the drain electrode of described second metal-oxide-semiconductor.
9. commutation circuit according to claim 8 is characterized in that, described first isolating device and/or described second isolating device are isolating diode;
And/or described state indicating module comprises first fluorescent tube and second fluorescent tube, wherein:
Described first fluorescent tube is connected between the grid and ground of described first metal-oxide-semiconductor;
Described second fluorescent tube is connected between the grid and ground of described second metal-oxide-semiconductor.
10. an electric supply installation is characterized in that, comprises the arbitrary described commutation circuit of first DC power supply, second DC power supply and claim 1 to 9, wherein:
Described first DC power supply links to each other with described first incoming end, and described second DC power supply links to each other with described second incoming end;
Described first DC power supply is used for the electric energy that to described first incoming end input meets the rated voltage of Devices to test;
Described second DC power supply is used for the electric energy that to described second incoming end input is greater than or less than the rated voltage of described Devices to test;
Described the 3rd incoming end links to each other with described Devices to test, is used to described Devices to test power supply.
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| CN 201110154418 CN102222972B (en) | 2011-06-02 | 2011-06-02 | Switching circuit and power supply device |
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| CN 201110154418 CN102222972B (en) | 2011-06-02 | 2011-06-02 | Switching circuit and power supply device |
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| CN102222972B CN102222972B (en) | 2013-07-17 |
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| CN103716035A (en) * | 2012-09-28 | 2014-04-09 | 华润矽威科技（上海）有限公司 | Signal selection circuit and secondary comparator including same |
| CN104734325A (en) * | 2015-04-09 | 2015-06-24 | 湖南艾德迅电气工业有限公司 | Direct current power source control system |
| CN105718821A (en) * | 2016-01-15 | 2016-06-29 | 广东欧珀移动通信有限公司 | Terminal and data protection apparatus and method therefor |
| CN105954606A (en) * | 2016-04-20 | 2016-09-21 | 上海斐讯数据通信技术有限公司 | Signal detection device and method |
| CN112260386A (en) * | 2019-07-22 | 2021-01-22 | 芜湖美的厨卫电器制造有限公司 | Water heater and power supply switching device thereof |
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| CN102222972B (en) | 2013-07-17 |
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