CN106159897A - A kind of multipurpose is waited power fluctuation broken circuit control device - Google Patents
A kind of multipurpose is waited power fluctuation broken circuit control device Download PDFInfo
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- CN106159897A CN106159897A CN201610786001.2A CN201610786001A CN106159897A CN 106159897 A CN106159897 A CN 106159897A CN 201610786001 A CN201610786001 A CN 201610786001A CN 106159897 A CN106159897 A CN 106159897A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/42—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to product of voltage and current
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Abstract
nullThe open a kind of multipurpose of the present invention is waited power fluctuation broken circuit control device，Include ac power input end INL、Ac power input end INN、Trip switch KL、Trip switch KN、Trip link mechanical component JKT、Tripping coil JKL、Electric current induction coil BX、Ac power output OUTL、Ac power output OUTN、Positive temperature protective resistance RT、Potentiometer RW、Resistance R1、Resistance R2、Resistance R3、Resistance R4、Resistance R5、Resistance R6、Electric capacity C1、Electric capacity C2、Electric capacity C3、Electric capacity C4、Diode D1、Diode D2、Diode D3、Stabilivolt W1、Stabilivolt W2、Trigger pipe B1、Trigger pipe B2、Luminous tube LED、Controllable silicon CR、Field effect transistor MOS、Forced cut-out button AN、Power fluctuation signaling switch KF；This device volume is little, low cost, micro power consumption so that electrical appliance is fully disconnected power supply, the most energy-conservation also protection electrical equipment itself after completing relevant work automatically；The especially protected effect with the prolongation life-span to the battery being electrically charged.
Description
Technical field
The present invention relates to control device art, refer in particular to the power fluctuation open circuit of waiting of a kind of multipurpose and control dress
Put.
Background technology
At present, vehicle charger (automobile, motor, tricycle) on the market, charger for mobile phone, all do not have charging complete certainly
Dynamic device of entirely cutting off the electricity supply, still in the free process recharged after charging complete, people have forgotten to pull out plug often, and cause
Battery overcharge so that battery accelerated ageing or damage, wastes electric energy simultaneously；For the kitchen appliance in family (such as electricity
Magnetic stove, electric rice pressure cooker, the electrical equipment such as microwave oven) waste electric energy of waiting for a long time, it is unfavorable for again the safety of electrical equipment itself, enters insulation
Electric rice pressure cooker, time often result in the rotten of the bottom of a pan food materials；Also have such as electric welding machine, television set, electric heater and other electricity
The most meaningless waste electric energy of waiting of the industrial electrical equipment that son controls.Current people commonly use time out-out to fill up these application skies
Lack, owing to being affectedly bashful of timing is inaccurate, the most not person of modern times's meaning.
Summary of the invention
In view of this, the present invention is directed to the disappearance of prior art existence, its main purpose is to provide a kind of multipurpose and waits
Power fluctuation broken circuit control device, it can effectively solve existing timing tripper correspondence and be affectedly bashful with the time inaccurate, fill up this and answer
With disappearance, substitute manpower intelligence so that electrical appliance is fully disconnected power supply after completing relevant work automatically, the most energy-conservation also protect
Electrical equipment itself；The especially protected effect with the prolongation life-span to the battery being electrically charged.
For achieving the above object, the present invention uses such as purgation technical scheme:
A kind of multipurpose is waited power fluctuation broken circuit control device, includes ac power input end INL, ac power input end
INN, trip switch KL, trip switch KN, trip link mechanical component JKT, tripping coil JKL, electric current induction coil BX, exchange
Power output end OUTL, ac power output OUTN, positive temperature protective resistance RT, potentiometer RW, resistance R1, resistance R2, resistance
R3, resistance R4, resistance R5, resistance R6, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, diode D1, diode D2, diode
D3, stabilivolt W1, stabilivolt W2, triggering pipe B1, triggering pipe B2, luminous tube LED, controllable silicon CR, field effect transistor MOS, pressure are broken
Road button AN, power fluctuation signaling switch KF；
Ac power input end INL connects trip switch KL front end, and trip switch KL rear end connects wire, and wire passes electric current sense
Answering and connect ac power output OUTL in the middle of coil BX magnet ring and connect one end of resistance RT, the other end of resistance RT connects two
The anode tap of pole pipe D3, the cathode terminal of diode D3 connects BA line, and BA line connects one end of resistance R4, and connects tripping coil
One end of JKL and the cathode terminal of diode D2, the other end of the anode tap shunt trip coil JKL of diode D2 and field effect transistor
The drain electrode S-phase of MOS connects, and the source electrode D of field effect transistor MOS connects BG line, and the control pole G of field effect transistor MOS connects BE line, BE line
It is connected with the negative electrode of one end, one end of resistance R6, one end of electric capacity C4 and the stabilivolt W2 of resistance R5；Another of resistance R6
End, the anode of the other end of electric capacity C4, stabilivolt W2 connect BG line；The other end of resistance R5 connects triggering pipe B1 and triggers pipe B2
One end of series connection group and one end of forced cut-out button AN；The other end of resistance R4, one end of resistance R3, one end of electric capacity C3,
The negative electrode of stabilivolt W1, triggering pipe B1 and the triggering other end of pipe B2 series connection group, the other end of forced cut-out button AN are all connected with
BB line；The anode of stabilivolt W1 is connected with one end of resistance R2 with one end of electric capacity C2；The other end of electric capacity C2 and electric capacity C3
The other end be connected BG line with the other end of resistance R3；The other end of resistance R2 connects the anode of luminous tube LED, luminous tube LED
Negative electrode connect the anode of controllable silicon CR and one end of power fluctuation signaling switch KF；The control pole of controllable silicon CR connects diode
The center contact end of the negative electrode of D1, one end of electric capacity C1 and potentiometer RW；The other end of power fluctuation signaling switch KF, controllable silicon
One end of the negative electrode of CR, the anode of diode D1, the other end of electric capacity C1 and potentiometer RW is all connected with BG line；Potentiometer RW's is another
One end is connected with one end of resistance R1, and the other end of resistance R1 is connected with one end of electric current induction coil BX, electric current induction coil
The other end of BX connects BG line；BG line is connected with ac power output OUTN, and ac power output OUTN connects dropout and opens
Closing KN rear end, trip switch KN front end connects on ac power input end INN.
As a kind of preferred version, described resistance R1, resistance R2, resistance R4 and resistance R5 are current-limiting resistance.
As a kind of preferred version, described resistance R3 and resistance R6 is bypass reset resistance.
As a kind of preferred version, described positive temperature protective resistance RT is NTC protective resistance.
As a kind of preferred version, described resistor RW is power sensing current node actuator.
As a kind of preferred version, described electric capacity C1 is high-frequency filter capacitor.
As a kind of preferred version, described electric capacity C2, electric capacity C3 and electric capacity C4 are time delay storage capacitor.
As a kind of preferred version, described controllable silicon CR is the high quick triggering small-sized controllable silicon of low maintenance.
As a kind of preferred version, described diode (LED) is node relay indicating light, selects efficient high brightness light-emitting diodes
Pipe.
It is thresholding trigger element as a kind of preferred version, described triggering pipe B1 and triggering pipe B2, selects DB3
The present invention compared with prior art has clear advantage and beneficial effect, specifically, as shown from the above technical solution:
By utilizing the low maintenance of high quick triggering small-sized silicon controlled micro-control on state characteristic and current sense coil with changed power
Small area analysis signal is combined with variable potentiometer regulation effect by current limliting, forms the adjustable electronic cutting of power fluctuation node of waiting
Close the charging time-delay characteristics formed in conjunction with resistance, electric capacity, trigger the voltage gating characteristics of pipe, define with watt level of waiting
Circuit is electronically activated with double maintenance of alternating-current pulse cycle length；Effectively adapt to current a large amount of electronics contravariant charger used
The double variation characteristic of power and frequency, also can meet the sampling detection of the power fluctuation of waiting of power frequency electrical equipment；Resistance in this device
R4 is that static work ties up a current path, is also the main current-limiting resistance of time-delay unit circuit, value 10M Ω, so this device
The most energy-conservation, estimate that this device static work power consumption is less than 0.015W；Between BB line and BC line, insert stabilivolt W1 set up
Force the priority task power supply of dropout break signal and extension earth leakage protective and overcurrent protection etc.；At controllable silicon CR anode and electricity
Hold and between C2 one end, seal in luminous tube LED and resistance R2 indicating operating status；Switch is accessed between controllable silicon CR anode and BG line
KF carries out power and energy；Carry out forcing dropout open circuit to be moved triggering pipe B1 and triggering pipe B2 series connection group two ends parallel connection press button AN
Make；Field effect transistor MOS forms self-insurance, the high impedance of stability maintenance with resistance R5, resistance R6, electric capacity C4, stabilivolt W2 and diode D2
Input electrical switch, reaches the impedance matching requirements of before and after's circuit；Apply existing conventional circuit breaker machinery and tripping coil
Complete open circuit work process.
Described in before combining, this device volume is little, low cost, micro power consumption, other existing break protecting the most compatible, can have
In the electrical equipment such as effect is implanted in battery charger, charger for mobile phone, kitchen socket, electric welding machine, it is also possible to make the multipurpose of uniqueness
Power fluctuation of waiting open circuit socket and multipurpose are waited power fluctuation killer switch, and supply has the power fluctuation and can of waiting
Use as on and off switch using the electrical equipment of power-off at any time, substitute manpower intelligence so that electrical appliance is automatic after completing relevant work
It is fully disconnected power supply, the most energy-conservation also protection electrical equipment itself；The especially protected effect with the prolongation life-span to the battery being electrically charged.
For more clearly illustrating architectural feature and effect of the present invention, come this with specific embodiment below in conjunction with the accompanying drawings
Bright it is described in detail.
Accompanying drawing explanation
Fig. 1 is the structural representation of the preferred embodiments of the invention.
Detailed description of the invention
Refer to shown in Fig. 1, that show the concrete structure of the preferred embodiments of the invention, include alternating current power supply defeated
Enter to hold INL, ac power input end INN, trip switch KL, trip switch KN, trip link mechanical component JKT, tripping coil
JKL, electric current induction coil BX, ac power output OUTL, ac power output OUTN, positive temperature protective resistance RT, current potential
Device RW, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, two
Pole pipe D1, diode D2, diode D3, stabilivolt W1, stabilivolt W2, triggering pipe B1, triggering pipe B2, luminous tube LED, controllable silicon
CR, field effect transistor MOS, forced cut-out button AN, power fluctuation signaling switch KF.
Ac power input end INL connects trip switch KL front end, and trip switch KL rear end connects wire, and wire is through electricity
Connecting ac power output OUTL in the middle of stream induction coil BX magnet ring and connect one end of resistance RT, the other end of resistance RT is even
Connecing the anode tap of diode D3, the cathode terminal of diode D3 connects BA line, and BA line connects one end of resistance R4, and connects trip line
One end of circle JKL and the cathode terminal of diode D2, the other end of the anode tap shunt trip coil JKL of diode D2 and field effect
The drain electrode S-phase of pipe MOS connects, and the source electrode D of field effect transistor MOS connects BG line, and the control pole G of field effect transistor MOS connects BE line, BE
Line is connected with the negative electrode of one end, one end of resistance R6, one end of electric capacity C4 and the stabilivolt W2 of resistance R5；Another of resistance R6
End, the anode of the other end of electric capacity C4, stabilivolt W2 connect BG line；The other end of resistance R5 connects triggering pipe B1 and triggers pipe B2
One end of series connection group and one end of forced cut-out button AN；The other end of resistance R4, one end of resistance R3, one end of electric capacity C3,
The negative electrode of stabilivolt W1, triggering pipe B1 and the triggering other end of pipe B2 series connection group, the other end of forced cut-out button AN are all connected with
BB line；The anode of stabilivolt W1 is connected with one end of resistance R2 with one end of electric capacity C2；The other end of electric capacity C2 and electric capacity C3
The other end be connected BG line with the other end of resistance R3；The other end of resistance R2 connects the anode of luminous tube LED, luminous tube LED
Negative electrode connect the anode of controllable silicon CR and one end of power fluctuation signaling switch KF；The control pole of controllable silicon CR connects diode
The center contact end of the negative electrode of D1, one end of electric capacity C1 and potentiometer RW；The other end of power fluctuation signaling switch KF, controllable silicon
One end of the negative electrode of CR, the anode of diode D1, the other end of electric capacity C1 and potentiometer RW is all connected with BG line；Potentiometer RW's is another
One end is connected with one end of resistance R1, and the other end of resistance R1 is connected with one end of electric current induction coil BX, electric current induction coil
The other end of BX connects BG line；BG line is connected with ac power output OUTN, and ac power output OUTN connects dropout and opens
Closing KN rear end, trip switch KN front end connects on ac power input end INN.
Described resistance R1, resistance R2, resistance R4 and resistance R5 are current-limiting resistance.Described resistance R3 and resistance R6 is side
Road reset resistor.Described positive temperature protective resistance RT is NTC protective resistance.Described resistor RW is the regulation of power sensing current node
Device.Described electric capacity C1 is high-frequency filter capacitor.Described electric capacity C2, electric capacity C3 and electric capacity C4 are time delay storage capacitor.Described can
Control silicon CR is the high quick triggering small-sized controllable silicon of low maintenance.Described diode (LED) is node relay indicating light, selects efficient high brightness
Light emitting diode.Described triggering pipe B1 and triggering pipe B2 is thresholding trigger element, selects DB3.
In the present embodiment, use the machinery of existing earth leakage circuit breaker and tripping coil assembly with shown in Fig. 1
Middle field effect transistor MOS and resistance R5, resistance R6, electric capacity C4, stabilivolt W2 and diode D2 composition electric drive dropout machinery group
Part unit；The high feature pressure, high input impedance utilizing field effect transistor MOS is made voltage and is driven electrical switch；De-driving
The waiting period of button, owing to resistance R6 bypasses discharge process, electric drive dropout mechanical component unit keeps waiting for peacefully；When forced cut-out is pressed
When button AN connects or triggering pipe B1 is triggered with triggering pipe B2 series connection group, BG line is produced more than+20V voltage by BD line, and BD line is electric
Pressing and charged electric capacity C4 by resistance R5, be limited in 20V by stabilivolt W2, meanwhile field effect transistor MOS is enough driven
Condition and turn on, power supply BA line and BG line voltage produce through tripping coil JKL and drive mechanical ability, and Crush trigger has been threaded off
Tripping action.
In the present embodiment, positive temperature protective resistance RT power rectifier and protected location are formed with rectifier tube D3；Just utilize
The thermoelectricity resistance of temperature protective resistance becomes big characteristic, produced the disconnected protection of flow resistance, and improved safety；Utilize the rectified action of rectifier tube
Produce the power frequency pulsating direct current of interval as electronic circuit working power.
In the present embodiment, formed pressure broken by forced cut-out button AN, stabilivolt W1, electric capacity C3, resistance R3, resistance R4
Road shutdown and preferred power supply unit thereof；Utilize the stabilizing voltage characteristic of stabilivolt, select 36V stabilivolt to insert between BB line and BC line；
Electric capacity C3 is charged, along with BB line voltage is increased to stabilivolt value 36V when power supply BA line forms electric current by resistance R4 to BB line
Time above, power supply BA line is formed electric current by resistance R4 to BB line and is charged electric capacity C2 by stabilivolt W1, now BB line and BC
Between line, generation suspension 36V energy storage is in electric capacity C3 two ends, and this electric capacity C3 two ends suspension 36V energy storage is exactly described
Preferred power supply；It exist for forced cut-out shutdown and extension earth leakage protective and overcurrent protection function provides and works at any time electricity
Source；When forced cut-out button AN connects, BB line voltage adds to BD line by forced cut-out button AN and threads off electric drive machine
Tool assembly unit drives, and completes dropout open circuit work.
In the present embodiment, by electric current induction coil BX, resistance R1, electric capacity C1, electric capacity C2, potentiometer RW, diode D1,
Controllable silicon CR, triggering pipe B1 and triggering pipe B2 composition electric current induction coil, turn-off current node sample touch with time delay node two dimension
Bill unit；Use existing small-sized 1:300 magnet ring structure electric current induction coil as this device electric current induction coil BX, utilize Gao Min
Trigger the design of low maintenance small-sized controllable silicon and be triggered with regard to the electrical switch reset, to electric capacity after controllable silicon CR is triggered each time
C2 discharges completely so that electric capacity C2 electronegative potential enters charging and starts district；As long as therefore electric capacity C2 starts Qu Beichong from charging
The voltage that raised of electricity is less than in the 30V time, and controllable silicon CR is triggered once or more again, and electric capacity C2 electronegative potential enters again
Enter charging beginning district, when so circulation continues, trigger pipe B1 and triggering pipe B2 series connection group trigger voltage 66V cannot be exceeded [BB
Line to BG line voltage equal to the stabilivolt W1 voltage stabilizing value 36V+ charged voltage of electric capacity C2, and present parallel connection triggering pipe B1 and
The total trigger voltage triggering pipe B2 series connection group is 66V, and before not being triggered, BD line current potential is equal to BG line current potential], this device keeps supplying
Electricity；When the faradic current of electric current induction coil BX is after the node of resistance R1 current limliting and potentiometer RW regulates, it is insufficient to trigger
During controllable silicon CR, although or have enough current trigger controllable silicon CR, but the current trigger cycle is more than electric capacity C2 from charging
Start district and be electrically charged raised voltage less than the 30V time period, now BB line to BD line voltage equal to or more than trigger pipe B1 and
Trigger pipe B2 series connection group trigger voltage 66V, trigger pipe B1 and triggering pipe B2 series connection group is punctured by lossless, through resistance R5 release electricity
Holding energy stored by C3 and electric capacity C2, charge electric capacity C4, be limited in 20V by stabilivolt W2, meanwhile field effect transistor MOS obtains
Turning on to enough drive conditions, power supply BA line and BG line voltage produce through tripping coil JKL and drive mechanical ability, trigger machine
Tool has been threaded off tripping action, cuts off the electricity supply.
In the present embodiment, luminous tube LED and resistance R2 composition current node work indicating member, when controllable silicon CR is touched
When sending out conducting, the electric energy on electric capacity C2 and the part electric energy on electric capacity C3 and carry out the power supply of self-resistance R4 and can limit through resistance R2
Stream, by luminous tube LED and controllable silicon CR to power supply BG line formed electric current, light luminous tube LED reach current node work refer to
Show purpose.
In the present embodiment, between the anode and negative electrode of controllable silicon CR, a switchette KF in parallel forms current node
Sampling triggers with time delay node two dimension and is turned on and off unit, and when switching KF and connecting, this device loses current node sampling
With time delay node two dimension Trigger Function, forced cut-out button AN carry out open circuit reset；When switching KF and disconnecting, this device recovers
Current node sampling and time delay node two dimension Trigger Function, possess proper function.
The above, be only presently preferred embodiments of the present invention, not impose any restrictions the technical scope of the present invention,
Therefore any trickle amendment, equivalent variations and modification that above example is made by every technical spirit according to the present invention, the most still
Belong in the range of technical solution of the present invention.
Claims (10)
1. a multipurpose is waited power fluctuation broken circuit control device, it is characterised in that: include ac power input end INL,
Ac power input end INN, trip switch KL, trip switch KN, trip link mechanical component JKT, tripping coil JKL, electric current
Induction coil BX, ac power output OUTL, ac power output OUTN, positive temperature protective resistance RT, potentiometer RW, resistance
R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, diode D1, two
Pole pipe D2, diode D3, stabilivolt W1, stabilivolt W2, triggering pipe B1, triggering pipe B2, luminous tube LED, controllable silicon CR, field effect
Pipe MOS, forced cut-out button AN, power fluctuation signaling switch KF；
Ac power input end INL connects trip switch KL front end, and trip switch KL rear end connects wire, and wire passes electric current sense
Answering and connect ac power output OUTL in the middle of coil BX magnet ring and connect one end of resistance RT, the other end of resistance RT connects two
The anode tap of pole pipe D3, the cathode terminal of diode D3 connects BA line, and BA line connects one end of resistance R4, and connects tripping coil
One end of JKL and the cathode terminal of diode D2, the other end of the anode tap shunt trip coil JKL of diode D2 and field effect transistor
The drain electrode S-phase of MOS connects, and the source electrode D of field effect transistor MOS connects BG line, and the control pole G of field effect transistor MOS connects BE line, BE line
It is connected with the negative electrode of one end, one end of resistance R6, one end of electric capacity C4 and the stabilivolt W2 of resistance R5；Another of resistance R6
End, the anode of the other end of electric capacity C4, stabilivolt W2 connect BG line；The other end of resistance R5 connects triggering pipe B1 and triggers pipe B2
One end of series connection group and one end of forced cut-out button AN；The other end of resistance R4, one end of resistance R3, one end of electric capacity C3,
The negative electrode of stabilivolt W1, triggering pipe B1 and the triggering other end of pipe B2 series connection group, the other end of forced cut-out button AN are all connected with
BB line；The anode of stabilivolt W1 is connected with one end of resistance R2 with one end of electric capacity C2；The other end of electric capacity C2 and electric capacity C3
The other end be connected BG line with the other end of resistance R3；The other end of resistance R2 connects the anode of luminous tube LED, luminous tube LED
Negative electrode connect the anode of controllable silicon CR and one end of power fluctuation signaling switch KF；The control pole of controllable silicon CR connects diode
The center contact end of the negative electrode of D1, one end of electric capacity C1 and potentiometer RW；The other end of power fluctuation signaling switch KF, controllable silicon
One end of the negative electrode of CR, the anode of diode D1, the other end of electric capacity C1 and potentiometer RW is all connected with BG line；Potentiometer RW's is another
One end is connected with one end of resistance R1, and the other end of resistance R1 is connected with one end of electric current induction coil BX, electric current induction coil
The other end of BX connects BG line；BG line is connected with ac power output OUTN, and ac power output OUTN connects dropout and opens
Closing KN rear end, trip switch KN front end connects on ac power input end INN.
A kind of multipurpose the most according to claim 1 is waited power fluctuation broken circuit control device, it is characterised in that: described electricity
Resistance R1, resistance R2, resistance R4 and resistance R5 are current-limiting resistance.
A kind of multipurpose the most according to claim 1 is waited power fluctuation broken circuit control device, it is characterised in that: described electricity
Resistance R3 and resistance R6 is bypass reset resistance.
A kind of multipurpose the most according to claim 1 is waited power fluctuation broken circuit control device, it is characterised in that: described just
Temperature protective resistance RT is NTC protective resistance.
A kind of multipurpose the most according to claim 1 is waited power fluctuation broken circuit control device, it is characterised in that: described electricity
Resistance device RW is power sensing current node actuator.
A kind of multipurpose the most according to claim 1 is waited power fluctuation broken circuit control device, it is characterised in that: described electricity
Appearance C1 is high-frequency filter capacitor.
A kind of multipurpose the most according to claim 1 is waited power fluctuation broken circuit control device, it is characterised in that: described electricity
Hold C2, electric capacity C3 and electric capacity C4 is time delay storage capacitor.
A kind of multipurpose the most according to claim 1 is waited power fluctuation broken circuit control device, it is characterised in that: described can
Control silicon CR is the high quick triggering small-sized controllable silicon of low maintenance.
A kind of multipurpose the most according to claim 1 is waited power fluctuation broken circuit control device, it is characterised in that: described two
Pole pipe LED is node relay indicating light, selects efficient high brightness light emitting diode.
A kind of multipurpose the most according to claim 1 is waited power fluctuation broken circuit control device, it is characterised in that: described
Trigger pipe B1 and triggering pipe B2 and be thresholding trigger element, select DB3.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110098725A (en) * | 2019-06-19 | 2019-08-06 | 邢台子中电子科技有限公司 | A kind of DC power supply output rectification tube protective circuit and method |
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| CN110098725A (en) * | 2019-06-19 | 2019-08-06 | 邢台子中电子科技有限公司 | A kind of DC power supply output rectification tube protective circuit and method |
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