CN106329963A - Bridge type switching apparatus for power supply - Google Patents
Bridge type switching apparatus for power supply Download PDFInfo
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- CN106329963A CN106329963A CN201610518570.9A CN201610518570A CN106329963A CN 106329963 A CN106329963 A CN 106329963A CN 201610518570 A CN201610518570 A CN 201610518570A CN 106329963 A CN106329963 A CN 106329963A
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- pnp triode
- field effect
- effect transistor
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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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- 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
- H02M1/12—Arrangements for reducing harmonics from ac input or output
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
Abstract
Disclosed is a bridge type switching apparatus for a power supply. A shell is provided with a positive electrode input terminal, a negative electrode input terminal, a first load terminal and a second load terminal, wherein a first control circuit, a second control circuit, a third control circuit and a fourth control circuit with the same structure are arranged in the shell; each of the first control circuit, the second control circuit, the third control circuit and the fourth control circuit comprises a PNP triode and an N-channel field effect transistor separately; and switch-on or cut-off of different control circuits is realized through connection between the PNP triodes and the N-channel field effect transistors, and the positive electrode input terminal, the negative electrode input terminal, the first load terminal and the second load terminal. According to the bridge type switching apparatus, when a load is connected with a power supply, control circuits of two modules of any polarity are switched on while the control circuits of the other two modules are cut off, so that power supply to the load is realized; meanwhile, the principle is simple, and the bridge type switching apparatus is quite convenient to implement; and in addition, each element is low in cost, and the apparatus cost is reduced.
Description
Technical field
The invention belongs to power supply control field, be specifically related to a kind of power supply bridge-type switching device.
Background technology
Load is powered when, need the existence of power supply, but some loads are easy to occur to connect anti-
Phenomenon.In the prior art, to the common solution of anti-phenomenon waiting be by identification circuit identification load positive and negative,
Realize load correct wiring.Complicated and relatively costly with the circuit that upper type relates to；And load and power supply need the when of connection
Divide both positive and negative polarity cumbersome.
Summary of the invention
It is desirable to provide simple in construction, power supply bridge-type switching device easy to use.
For solving above-mentioned technical problem, the invention provides following technical scheme: a kind of power supply bridge-type switching device,
Including housing, housing is provided with positive input terminal, negative input terminal, the first face terminals and the second face terminals；
Enclosure interior is provided with positive pole input pin, negative pole input pin, the first load prongs, the second load prongs, the first control
Pin, the second control pin, first control circuit, second control circuit, the 3rd control circuit and the 4th control circuit；
First load prongs connects the first control pin by the first optocoupler；Second load prongs connects second by the second optocoupler
Control pin；Positive pole input pin connects positive input terminal, negative pole input pin connects negative input terminal, the first load end
Son connects the first load prongs, the second face terminals connects the second load prongs；
First control circuit includes the first PNP triode and the first N-channel field effect transistor；
Positive pole input pin connects the drain electrode of the first N-channel field effect transistor, and the grid of the first N-channel field effect transistor connects the first control
Making foot, the source electrode of the first N-channel field effect transistor connects the first load prongs；
First controls pin connects the base stage of the first PNP triode, and the emitter stage of the first PNP triode connects the first N-channel field
The grid of effect pipe, the colelctor electrode of the first PNP triode connects the first load prongs；
Second control circuit includes the second PNP triode and the second N-channel field effect transistor；
Positive pole input pin connects the drain electrode of the second N-channel field effect transistor, and the grid of the second N-channel field effect transistor connects the second control
Making foot, the source electrode of the second N-channel field effect transistor connects the second load prongs；
Second controls pin connects the base stage of the second PNP triode, and the emitter stage of the second PNP triode connects the second N-channel field
The grid of effect pipe, the colelctor electrode of the second PNP triode connects the second load prongs；
3rd control circuit includes the 3rd PNP triode and the 3rd N-channel field effect transistor；
Negative pole input pin connects the source electrode of the 3rd N-channel field effect transistor, and the grid of the 3rd N-channel field effect transistor connects the second control
Making foot, the drain electrode of the 3rd N-channel field effect transistor connects the first load prongs；
Second controls pin connects the base stage of the 3rd PNP triode, and the emitter stage of the 3rd PNP triode connects the 3rd N-channel field
The grid of effect pipe, the colelctor electrode of the 3rd PNP triode connects negative pole input pin；
4th control circuit includes the 4th PNP triode and the 4th N-channel field effect transistor；
Negative pole input pin connects the source electrode of the 4th N-channel field effect transistor, and the grid of the 4th N-channel field effect transistor connects the first control
Making foot, the drain electrode of the 4th N-channel field effect transistor connects the second load prongs；
First controls pin connects the base stage of the 4th PNP triode, and the emitter stage of the 4th PNP triode connects the 4th N-channel field
The grid of effect pipe, the colelctor electrode of the 4th PNP triode connects negative pole input pin.
First load prongs connects the input of the first optocoupler by the second dead resistance, and first controls pin connects first
The outfan of optocoupler；Second load prongs connects the input of the second optocoupler by the 3rd dead resistance, and second controls pin even
Connect the outfan of the second optocoupler.
Control circuit also includes the rectification circuit providing power supply for the first optocoupler and the second optocoupler, and rectification circuit includes first
Commutation capacitor, the second commutation capacitor, the 3rd commutation capacitor, the first commutation diode, the second commutation diode, the 3rd rectification two pole
Pipe and the first dead resistance；
First commutation capacitor connects positive pole and the second commutation diode negative pole of the first commutation diode respectively；First rectification two pole
The negative pole of pipe connects the first end of the first dead resistance；The positive pole of the second commutation diode connects ground connection, the second commutation diode
Positive pole connect the first end of the first dead resistance also by the second commutation capacitor, the positive pole of the second commutation diode leads to the most respectively
Cross the 3rd commutation diode and the 3rd commutation capacitor connects the second end of the first dead resistance.
Being additionally provided with ac terminal on housing, ac terminal connects the first commutation capacitor.
First control circuit, second control circuit, the 3rd control circuit and the 4th control circuit all include forming identical
Anti-turning circuit, the anti-turning circuit in first control circuit includes the first diode and the 4th resistance being connected in parallel, first
The positive pole of diode connects grid and the base stage of the first PNP triode of the first N-channel field effect transistor respectively, the first diode
Negative pole connects source electrode and the colelctor electrode of the first PNP triode of the first N-channel field effect transistor.
First controls pin connects the base stage of the first PNP triode by the first resistance；First controls pin by first
Resistance and the second resistance connect the grid of the first N-channel field effect transistor；First controls pin connects the 4th by the 13rd resistance
The base stage of PNP triode, first controls pin connects the 4th N-channel field effect transistor by the 13rd resistance and the 14th resistance
Grid；Second controls pin connects the base stage of the second PNP triode by the 5th resistance, and second controls pin by the 5th resistance
With the grid that the 6th resistance connects the second N-channel field effect transistor；Second controls pin is connected by the 9th resistance and the tenth resistance
The base stage of the 3rd PNP triode, second controls pin connects the grid of the 3rd N-channel field effect transistor by the 9th resistance.
Connect between base stage and first load prongs of the first PNP triode and have the 3rd resistance；The base of the second PNP triode
Connect between pole and the second load prongs and have the 7th resistance；Connect between base stage and the negative pole input pin of the 3rd PNP triode
There is the 11st resistance；Connect between base stage and the negative pole input pin of the 4th PNP triode and have the 16th resistance.
By above technical scheme, the invention have the benefit that
1. by arranging four identical control circuits of structure, when load and power supply connect when, not polarity, all can have two
Individual control circuit turns on, and two other control circuit is ended, and to realize load supplying, principle is simple, implements comparison side
Just.
2. the first face terminals connects the first control pin by the first optocoupler；Second face terminals is coupled by the second light
Connect the second control pin, can reduce, by the first optocoupler and the second optocoupler, the impact that signal is transmitted by external interference, setting
Second dead resistance and the 3rd dead resistance can avoid the first optocoupler and the second optocoupler by affected by high respectively, extend the first light
Coupling and the service life of the second optocoupler.
3. the ac terminal arranged facilitates the introducing of alternating current.
4. the anti-turning circuit arranged is possible to prevent N-channel field effect transistor and PNP triode to be reversed electromotive force impact, from
And ensure the service life of N-channel field effect transistor and PNP triode.
Accompanying drawing explanation
Fig. 1 is present configuration schematic diagram；
Fig. 2 is circuit theory diagrams of the present invention；
Fig. 3 is rectification circuit schematic diagram.
Detailed description of the invention
The bridge-type switching device of power supply as shown in Figure 1, Figure 2 and Figure 3, including housing 1, is provided with positive pole on housing 1
Input terminal 2, negative input terminal the 3, first face terminals the 4, second face terminals 5 and ac terminal 6.Wherein, positive pole input
Terminal 2 is for connecting the positive pole of power supply, and negative input terminal 3 connects the negative pole of power supply, the first face terminals 4 and the second load end
Son 5 connects the positive and negative electrode of load respectively, and ac terminal 6 connects alternating current power supply.
Positive pole input pin E, negative pole input pin F, the first load prongs A, the second load prongs are set inside housing 1
B, the first control pin C, the second control pin D, first control circuit, second control circuit, the 3rd control circuit and the 4th control
Circuit processed.In order to ensure first control circuit, second control circuit, the 3rd control circuit and the stable work of the 4th control circuit
Make, prevent outer signals from first control circuit, second control circuit, the 3rd control circuit and the 4th control circuit are caused shadow
Ringing, the material selection metal of housing 1, can select ferrum, meanwhile, the shape of housing 1 is chosen as rectangular-shaped.
Power supply bridge-type switching device of the present invention is used for the power supply situation to load supplying, and wherein load refers to level
Deng the element needing charging.
Positive pole input pin E and positive input terminal 2 electrically connect, so that positive pole input pin E and the positive pole of power supply
Connect.Negative pole input pin F and negative input terminal 3 electrically connect, so that the negative pole of negative pole input pin F and power supply is even
Connect.First load prongs A electrically connects the first face terminals 4, and the second load prongs B electrically connects the second face terminals 5, so that
First load prongs A, the second load prongs B connect load.
First load prongs A connects the input of the first optocoupler OC1 by the second dead resistance R2, and first controls pin C
Connect the outfan of the first optocoupler OC1.
Second load prongs B connects the input of the second optocoupler OC1 by the 3rd dead resistance R3, and second controls pin D
Connect the outfan of the second optocoupler OC1.
The first optocoupler arranged and the second optocoupler avoid the interference of clutter so that first controls the level and first of pin
The level of load prongs A is consistent；The level of the second level controlling pin and the second load prongs B is consistent, and then improves this
Safety during device use.The second dead resistance and the 3rd dead resistance that arrange are possible to prevent the first optocoupler and second
Optocoupler is in use broken down by high-voltage, it is ensured that the first optocoupler and the normal service life of the second optocoupler.
In order to provide electric energy to the first optocoupler OC1 and the second optocoupler OC2, this device has rectification circuit.Rectification circuit
Including exchange pin G, the first commutation capacitor C1, the second commutation capacitor C2, the 3rd commutation capacitor C3, the first commutation diode D1,
Second commutation diode D2, the 3rd commutation diode D3 and the first dead resistance R1.Exchange pin G and ac terminal 6 electrically connect,
First commutation capacitor C1 one end connects exchange pin G, and the other end connects the positive pole of the first commutation diode D1 and second whole respectively
The negative pole of stream diode D2；The negative pole of the first commutation diode D1 connects first end of the first dead resistance R1；Second rectification two
The plus earth of pole pipe D2；The positive pole of the second commutation diode D2 connects the first dead resistance R1 also by the second commutation capacitor C2
The first end, the positive pole of the second commutation diode D2 is connected by the 3rd commutation diode D3 and the 3rd commutation capacitor C3 the most respectively
Second end of the first dead resistance R1.
The the first commutation capacitor C1 arranged can carry out preliminary rectification to alternating current, at the first commutation diode D1 and the
The signal of telecommunication that under the effect of two commutation diode D2, preliminary rectification goes out becomes unidirectional current.The the second commutation capacitor C2 and the 3rd arranged
DC signal is further filtered by commutation capacitor C3, prevents from wherein having the noise signals such as AC signal.
First control circuit includes the first N-channel field effect transistor QP11 and the first PNP triode Q11, positive pole input pin E
Connect the drain electrode of the first N-channel field effect transistor QP11, the grid of the first N-channel field effect transistor QP11 by the second resistance R012 and
First resistance R011 connects the first control pin C.The the first resistance R011 and the second resistance R012 that arrange can be to the first N-channel
Field effect transistor QP11 is protected, and prevents the longevity because adding overtension on its gate, to the first N-channel field effect transistor QP11
Life has adverse effect on, and the source electrode of the first N-channel field effect transistor QP11 connects the first load prongs A.
First controls pin C connects the base stage of the first PNP triode Q11, the first of setting also by the first resistance R011
Resistance R011 protects the first PNP triode Q11, prevents it to be broken down by high-voltage.The emitter stage of the first PNP triode Q11 connects the
The grid of one N-channel field effect transistor QP11；Meanwhile, the emitter stage of the first PNP triode Q11 connects also by the 3rd resistance R013
First load prongs A.The first PNP triode Q11 arranged can make rapidly the first N-channel field effect conducting when
Voltage at the grid of pipe QP11 is consumed and closes, thus improves the sensitivity of this device, in the both positive and negative polarity exchange of load
When, make quickly reaction.
Affect to prevent the first N-channel field effect transistor QP11 and the first PNP triode Q11 to be reversed electromotive force, first
Also including anti-turning circuit in control circuit, anti-turning circuit includes the first diode D11 and the 4th resistance being connected in parallel
R014, the positive pole of the first diode D11 connects grid and first PNP triode Q11 of the first N-channel field effect transistor QP11 respectively
Base stage, the negative pole of the first diode D11 connects the source electrode of the first N-channel field effect transistor QP11 and the first PNP triode Q11
Colelctor electrode.When there being inverse electromotive force, this inverse electromotive force can consume between the 4th resistance R014 and the first diode D11
Fall, thus do not affect the first N-channel field effect transistor QP11 and the normal service life of the first PNP triode Q11.
Second control circuit includes the second N-channel field effect transistor QP12 and the second PNP triode Q12, positive pole input pin E
Connect the drain electrode of the second N-channel field effect transistor QP12, the grid of the second N-channel field effect transistor QP12 by the 6th resistance R016 and
5th resistance R015 connects the second control pin D.The 5th resistance R015 and the 6th resistance R016 that arrange can be to the second N-channel
Field effect transistor QP12 is protected, and prevents the longevity because adding overtension on its gate, to the second N-channel field effect transistor QP12
Life has adverse effect on, and the source electrode of the second N-channel field effect transistor QP12 connects the first load prongs B.
Second controls pin D connects the base stage of the second PNP triode Q12, the 5th of setting also by the 5th resistance R015
Resistance R015 protects the second PNP triode Q12, prevents it to be broken down by high-voltage.The emitter stage of the second PNP triode Q12 connects the
The grid of two N-channel field effect transistor QP12；Meanwhile, the emitter stage of the second PNP triode Q12 connects also by the 7th resistance R017
Second load prongs B.The second PNP triode Q12 arranged can make rapidly the second N-channel field effect conducting when
Voltage at the grid of pipe QP12 is closed because being consumed, thus improves the sensitivity of this device, and the both positive and negative polarity in load is handed over
The when of changing, make quickly reaction.
Affect to prevent the second N-channel field effect transistor QP12 and the second PNP triode Q12 to be reversed electromotive force, second
Also including anti-turning circuit in control circuit, anti-turning circuit includes the second diode D12 and the 8th resistance being connected in parallel
R018, the positive pole of the second diode D12 connects grid and second PNP triode Q12 of the second N-channel field effect transistor QP12 respectively
Base stage, the negative pole of the second diode D12 connects the source electrode of the second N-channel field effect transistor QP12 and the second PNP triode Q12
Colelctor electrode.When there being inverse electromotive force, this inverse electromotive force can consume between the 8th resistance R018 and the second diode D12
Fall, thus do not affect the second N-channel field effect transistor QP12 and the normal service life of the second PNP triode Q12.
3rd control circuit includes the 3rd N-channel field effect transistor QP13 and the 3rd PNP triode Q13, negative pole input pin F
Connect the source electrode of the 3rd N-channel field effect transistor QP13, the grid of the 3rd N-channel field effect transistor QP13 by the tenth resistance R110 and
9th resistance R019 connects the second control pin D.The 9th resistance R019 and the tenth resistance R110 that arrange can be to the 3rd N-channel
Field effect transistor QP13 is protected, and prevents because adding overtension on its gate, the longevity to the 3rd N-channel field effect transistor QP13
Life has adverse effect on, and the drain electrode of the 3rd N-channel field effect transistor QP13 connects the first load prongs A.
Second controls pin D connects the base stage of the 3rd PNP triode Q13, the 9th of setting also by the 9th resistance R019
Resistance R019 protects the 3rd PNP triode Q13, prevents it to be broken down by high-voltage.The emitter stage of the 3rd PNP triode Q13 connects the
The grid of three N-channel field effect transistor QP13；Meanwhile, the emitter stage of the 3rd PNP triode Q13 is also by the 11st resistance R111 even
Meet negative pole input pin F.The 3rd PNP triode Q13 arranged can make rapidly the 3rd N-channel field effect conducting when
Should be consumed and close by voltage at the grid of pipe QP13, thus improve the sensitivity of this device, the both positive and negative polarity in load is handed over
The when of changing, make quickly reaction.
Affect to prevent the 3rd N-channel field effect transistor QP13 and the 3rd PNP triode Q13 to be reversed electromotive force, the 3rd
Also including anti-turning circuit in control circuit, anti-turning circuit includes the 3rd diode D13 and the 12nd resistance being connected in parallel
The positive pole of R112, the 3rd diode D13 connects grid and the 3rd PNP triode Q13 of the 3rd N-channel field effect transistor QP13 respectively
Base stage, the negative pole of the 3rd diode D13 connects the source electrode of the 3rd N-channel field effect transistor QP13 and the 3rd PNP triode Q13
Colelctor electrode.When there being inverse electromotive force, this inverse electromotive force can consume between the 12nd resistance R112 and the 3rd diode D13
Fall, thus do not affect the 3rd N-channel field effect transistor QP13 and the normal service life of the 3rd PNP triode Q13.
4th control circuit includes the 4th N-channel field effect transistor QP14 and the 4th PNP triode Q14, negative pole input pin F
Connect the source electrode of the 4th N-channel field effect transistor QP14；The grid of the 4th N-channel field effect transistor QP14 passes through the 14th resistance R114
The first control pin C is connected with the 13rd resistance R113.The 13rd resistance R113 and the 14th resistance R114 that arrange can be right
4th N-channel field effect transistor QP14 is protected, and prevents because adding overtension on its gate, to the 4th N-channel field effect
The life-span of pipe QP14 has adverse effect on, and the drain electrode of the 4th N-channel field effect transistor QP14 connects the second load prongs B.
First controls pin C connects the base stage of the 4th PNP triode Q14, the of setting also by the 13rd resistance R113
13 resistance R113 protect the 4th PNP triode Q14, prevent it to be broken down by high-voltage.The emitter stage of the 4th PNP triode Q14 is even
Connect the grid of the 4th N-channel field effect transistor QP14；Meanwhile, the emitter stage of the 4th PNP triode Q14 is also by the 16th resistance
R116 connects negative pole input pin F.The 4th PNP triode Q14 arranged can make rapidly the 4th N ditch conducting when
Close because voltage is consumed at the grid of road field effect transistor QP14, thus improve the sensitivity of this device, in load just
The when of negative pole exchange, make quickly reaction.
Affect to prevent the 4th N-channel field effect transistor QP14 and the 4th PNP triode Q14 to be reversed electromotive force, the 4th
Also including anti-turning circuit in control circuit, anti-turning circuit includes the 4th diode D14 and the 15th resistance being connected in parallel
The positive pole of R115, the 4th diode D14 connects grid and the 4th PNP triode Q14 of the 4th N-channel field effect transistor QP14 respectively
Base stage, the negative pole of the 4th diode D14 connects the source electrode of the 4th N-channel field effect transistor QP14 and the 4th PNP triode Q14
Colelctor electrode.When there being inverse electromotive force, this inverse electromotive force can consume between the 15th resistance R115 and the 4th diode D14
Fall, thus do not affect the 4th N-channel field effect transistor QP14 and the normal service life of the 4th PNP triode Q14.
The when of work, when the first load prongs A connects the positive pole of load, and the second load prongs B connects the negative pole of load
Time, have situations below and occur:
Because the first load prongs A connects the positive pole of load, the first load prongs A has initial high level, the second load
Initial low level is had on pin B；
For first control circuit: the grid of the first N-channel field effect transistor QP11 is high level, the base of the first PNP triode Q11
Extremely high level；First N-channel field effect transistor QP11 conducting, the first PNP triode Q12 cut-off, electric current is from positive input terminal
Through the first N-channel field effect transistor QP11, enter in the first face terminals of load, load positive pole is charged.
For second control circuit: the grid of the second N-channel field effect transistor QP12 is low level, the second PNP triode Q12
Base stage be low level, the second PNP triode Q12 conducting, and rapidly by the second N-channel field effect transistor QP12 cut-off；Now, just
Electric current on the input terminal of pole cannot be introduced in the second load prongs B.
For the 3rd control circuit, the grid of the 3rd N-channel field effect transistor QP13 is low level, the 3rd PNP triode Q13
Base stage be low level, the 3rd PNP triode QP13 conducting, and rapidly by the 3rd N-channel field effect transistor Q13 cut-off；Now, negative
Electric current on the input terminal of pole cannot be introduced in the first load prongs A.
For the 4th control circuit, the grid of the 4th N-channel field effect transistor QP14 is high level, the 4th PNP triode Q14
Base stage be high level；4th N-channel field effect transistor QP14 conducting, the 4th PNP triode Q14 cut-off, in the second face terminals
Electric current by passing sequentially through the second load prongs B, the 4th N-channel field effect transistor QP14 enters in negative pole input pin, right
Load negative pole is charged.
When the first face terminals connects the negative pole of load, and the second face terminals connects the positive pole of load, have following feelings
Condition occurs:
Because the first face terminals connects the negative pole of load, having initial low level in the first load prongs A, the second load is drawn
Initial high level is had on foot B；
For first control circuit: the grid of the first N-channel field effect transistor QP11 is low level, the base of the first PNP triode Q12
Extremely low level；First N-channel field effect transistor QP11 cut-off, the first PNP triode Q12 conducting, now, on positive input terminal
Electric current cannot be introduced in the first load prongs.
For second control circuit: the grid of the second N-channel field effect transistor QP12 is high level, the second PNP triode Q12
Base stage be high level；Second N-channel field effect transistor QP12 conducting, the second PNP triode Q12 cut-off, on positive input terminal
Electric current from the second N-channel field effect transistor QP12 process, enter into the second load prongs, eventually enter into the second load end of load
In son, the positive pole of load is charged.
For the 3rd control circuit: the grid of the 3rd N-channel field effect transistor QP13 is high level, the 3rd PNP triode Q13
Base stage be high level；3rd N-channel field effect transistor QP13 conducting, the 3rd PNP triode Q13 cut-off, in the second load prongs B
Electric current enter in negative pole input pin F by the 3rd N-channel field effect transistor QP13, to load negative pole be charged.
For the 4th control circuit: the grid of the 4th N-channel field effect transistor QP14 is low level, the 4th PNP triode Q14
Base stage be low level, the 4th PNP triode Q14 conducting, and rapidly by the 4th N-channel field effect transistor QP14 cut-off；Now, negative
Electric current on the input terminal of pole cannot be introduced in negative pole input pin F.
Therefore, the first face terminals and the positive pole of whichever connection load of the second face terminals and negative pole all can make positive pole
Load is powered by the power supply connected on input terminal and negative input terminal, so that the power supply of power supply is convenient,
Not polarity, uses more flexible.
Present configuration is simple, by arranging four the identical first control circuits of structure, second control circuit, the 3rd controls
Circuit processed and the 4th control circuit, when load and power supply connect when, not polarity, all can there be two control circuit conductings,
Two other control circuit is ended, and to realize load supplying, principle is simple, implements more convenient, the one-tenth of each element
This is cheap, thus reduces installation cost.
Claims (7)
1. a power supply bridge-type switching device, including housing, it is characterised in that: housing is provided with positive input terminal, negative pole
Input terminal, the first face terminals and the second face terminals；
Enclosure interior is provided with positive pole input pin, negative pole input pin, the first load prongs, the second load prongs, the first control
Pin, the second control pin, first control circuit, second control circuit, the 3rd control circuit and the 4th control circuit；
First load prongs connects the first control pin by the first optocoupler；Second load prongs connects second by the second optocoupler
Control pin；Positive pole input pin connects positive input terminal, negative pole input pin connects negative input terminal, the first load end
Son connects the first load prongs, the second face terminals connects the second load prongs；
First control circuit includes the first PNP triode and the first N-channel field effect transistor；
Positive pole input pin connects the drain electrode of the first N-channel field effect transistor, and the grid of the first N-channel field effect transistor connects the first control
Making foot, the source electrode of the first N-channel field effect transistor connects the first load prongs；
First controls pin connects the base stage of the first PNP triode, and the emitter stage of the first PNP triode connects the first N-channel field
The grid of effect pipe, the colelctor electrode of the first PNP triode connects the first load prongs；
Second control circuit includes the second PNP triode and the second N-channel field effect transistor；
Positive pole input pin connects the drain electrode of the second N-channel field effect transistor, and the grid of the second N-channel field effect transistor connects the second control
Making foot, the source electrode of the second N-channel field effect transistor connects the second load prongs；
Second controls pin connects the base stage of the second PNP triode, and the emitter stage of the second PNP triode connects the second N-channel field
The grid of effect pipe, the colelctor electrode of the second PNP triode connects the second load prongs；
3rd control circuit includes the 3rd PNP triode and the 3rd N-channel field effect transistor；
Negative pole input pin connects the source electrode of the 3rd N-channel field effect transistor, and the grid of the 3rd N-channel field effect transistor connects the second control
Making foot, the drain electrode of the 3rd N-channel field effect transistor connects the first load prongs；
Second controls pin connects the base stage of the 3rd PNP triode, and the emitter stage of the 3rd PNP triode connects the 3rd N-channel field
The grid of effect pipe, the colelctor electrode of the 3rd PNP triode connects negative pole input pin；
4th control circuit includes the 4th PNP triode and the 4th N-channel field effect transistor；
Negative pole input pin connects the source electrode of the 4th N-channel field effect transistor, and the grid of the 4th N-channel field effect transistor connects the first control
Making foot, the drain electrode of the 4th N-channel field effect transistor connects the second load prongs；
First controls pin connects the base stage of the 4th PNP triode, and the emitter stage of the 4th PNP triode connects the 4th N-channel field
The grid of effect pipe, the colelctor electrode of the 4th PNP triode connects negative pole input pin.
2. power supply bridge-type switching device as claimed in claim 1, it is characterised in that: the first load prongs passes through the second rectification
Resistance connects the input of the first optocoupler, and first controls pin connects the outfan of the first optocoupler；Second load prongs is by the
Three dead resistances connect the input of the second optocoupler, and second controls pin connects the outfan of the second optocoupler.
3. power supply bridge-type switching device as claimed in claim 2, it is characterised in that: control circuit also includes being the first optocoupler
With the rectification circuit that the second optocoupler provides power supply, rectification circuit includes the first commutation capacitor, the second commutation capacitor, the 3rd rectified current
Appearance, the first commutation diode, the second commutation diode, the 3rd commutation diode and the first dead resistance；
First commutation capacitor connects positive pole and the second commutation diode negative pole of the first commutation diode respectively；First rectification two pole
The negative pole of pipe connects the first end of the first dead resistance；The positive pole of the second commutation diode connects ground connection, the second commutation diode
Positive pole connect the first end of the first dead resistance also by the second commutation capacitor, the positive pole of the second commutation diode leads to the most respectively
Cross the 3rd commutation diode and the 3rd commutation capacitor connects the second end of the first dead resistance.
4. power supply bridge-type switching device as claimed in claim 3, it is characterised in that: it is additionally provided with ac terminal on housing,
Ac terminal connects the first commutation capacitor.
5. power supply bridge-type switching device as claimed in claim 4, it is characterised in that: first control circuit, the second control electricity
Road, the 3rd control circuit and the 4th control circuit all include forming identical anti-turning circuit, and anti-in first control circuit is led
Circuit passband includes the first diode and the 4th resistance being connected in parallel, and the positive pole of the first diode connects the first N-channel field respectively
The grid of effect pipe and the base stage of the first PNP triode, the negative pole of the first diode connects the source electrode of the first N-channel field effect transistor
Colelctor electrode with the first PNP triode.
6. power supply bridge-type switching device as claimed in claim 5, it is characterised in that: first controls pin by the first resistance
Connect the base stage of the first PNP triode；First controls pin connects the first N-channel field effect by the first resistance and the second resistance
The grid of pipe；First controls pin connects the base stage of the 4th PNP triode by the 13rd resistance, and first controls pin by the
13 resistance and the 14th resistance connect the grid of the 4th N-channel field effect transistor；Second controls pin is connected by the 5th resistance
The base stage of the second PNP triode, second controls pin connects the second N-channel field effect transistor by the 5th resistance and the 6th resistance
Grid；Second controls pin connects the base stage of the 3rd PNP triode by the 9th resistance and the tenth resistance, and second controls pin leads to
Cross the 9th resistance and connect the grid of the 3rd N-channel field effect transistor.
7. power supply bridge-type switching device as claimed in claim 6, it is characterised in that: the base stage of the first PNP triode and the
Connect between one load prongs and have the 3rd resistance；Connect between base stage and second load prongs of the second PNP triode and have the 7th
Resistance；Connect between base stage and the negative pole input pin of the 3rd PNP triode and have the 11st resistance；The base of the 4th PNP triode
Connect between pole and negative pole input pin and have the 16th resistance.
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| CN201610518570.9A CN106329963B (en) | 2016-07-05 | 2016-07-05 | A kind of power supply bridge-type switching device |
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| CN201610518570.9A CN106329963B (en) | 2016-07-05 | 2016-07-05 | A kind of power supply bridge-type switching device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108539810A (en) * | 2018-03-30 | 2018-09-14 | 中船重工中南装备有限责任公司 | A kind of battery supply protection circuit |
| CN108599558A (en) * | 2018-05-17 | 2018-09-28 | 合肥威迪变色玻璃有限公司 | Control circuit based on low pressure H bridges |
| CN114441976A (en) * | 2020-11-04 | 2022-05-06 | 中移物联网有限公司 | Battery capacity detection device and method and computer readable storage medium |
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| CN114441976A (en) * | 2020-11-04 | 2022-05-06 | 中移物联网有限公司 | Battery capacity detection device and method and computer readable storage medium |
Also Published As
| Publication number | Publication date |
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| CN106329963B (en) | 2019-05-28 |
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