CN108199566A - Direct current window type work high temperature pulse power supply with DC over-voltage protection - Google Patents
Direct current window type work high temperature pulse power supply with DC over-voltage protection Download PDFInfo
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- CN108199566A CN108199566A CN201711435648.1A CN201711435648A CN108199566A CN 108199566 A CN108199566 A CN 108199566A CN 201711435648 A CN201711435648 A CN 201711435648A CN 108199566 A CN108199566 A CN 108199566A
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
- H02H11/006—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of too high or too low voltage
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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
- H02H3/50—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 the appearance of abnormal wave forms, e.g. ac in dc installations
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/1213—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for DC-DC converters
Abstract
The present invention provides a kind of direct current window type work high temperature pulse power supply with DC over-voltage protection, is related to pulse field of power supplies；Overvoltage protection and under-voltage protection effect which solve existing high temperature pulse power supply is bad, easily causes the problem of power supply damages；Power supply of the present invention is mainly made of current rectifying and wave filtering circuit, direct current under-voltage protecting circuit, DC over-voltage protection circuit, control IC, metal-oxide-semiconductor Q3 and boosting unit, and with an improved direct current under-voltage protecting circuit and DC over-voltage protection circuits.The effect that the present invention protects direct current under-voltage is more preferable, in input undervoltage, does not give control IC power supplies, is increased in the range of nominal tension to the supply current of control IC, product is made also reliably to start in the case of a high temperature；The effect that the present invention protects DC over-voltage is more preferable, and in a manner that voltage-stabiliser tube adds sampling resistor, in input voltage overvoltage, larger electric current can be generated on sampling resistor, at high temperature also can reliably working.
Description
Technical field
The present invention relates to pulse field of power supplies, work more particularly, to a kind of direct current window type with DC over-voltage protection
High temperature pulse power supply.
Background technology
High temperature pulse power supply is a kind of in the rated direct voltage of 200~230Vdc of its input terminal access, and meeting is defeated
Go out high voltage, high current pulse energy.This power work environment temperature high (reaching as high as 225 DEG C), live electric power thus supplied
It is complicated (to have the ac/dc voltage that other various equipment need each voltage class, AC voltage range：0~380Vac, direct current
Voltage range：0~300Vdc), input end cable length (up to 10km) and mix with other cables.
When this power supply product due to wiring error or due between input cable insulating layer breakage cause product input terminal
When having accessed abnormal DC voltage, such as input reverse voltage (- 600~0Vdc), direct current is under-voltage (0~150Vdc),
When DC over-voltage (250~300Vdc), product cannot work and be very easy to damage, therefore this product is usual
It is required for increasing the safeguard function to abnormal DC voltage.
Fig. 1 provides a kind of DC protection circuit of existing product, and operation principle is as follows：
The protection under-voltage to direct current：The startup voltage as control IC ' is divided by using resistance R5 ', resistance R6 ', when
When input dc power is pressed in 0~150Vdc, the startup voltage threshold of control IC ' is not achieved due to starting voltage, controls IC ' not works
Make.But with the raising of environment temperature, the leakage current of control IC ' can be increasing, and in 225 DEG C of environment temperature, leakage current can
To reach 10mA or so.And R5 ' is influenced by volume, radiating condition, the current value of design is generally less than 5mA, this is resulted in
Under hot environment, even if input terminal accesses specified direct-current working volts, product can not work.
Protection to DC over-voltage：Input voltage is sampled by using resistance R1 ', resistance R2 ', if input terminal direct current
Overtension, sampled voltage will be above reference voltage V ref, turn off Q1 ', and main circuit does not work.But in 225 DEG C of high temperature
In the case of, reference voltage V ref can be reduced to 60% of room temperature or so, while the leakage current of triode Q2 ' becomes larger, in input electricity
Pressure is not up to Overpressure door and prescribes a time limit, and Q2 ' will be connected, and drag down Q1 ' gate voltages, make product can not normal work under rated voltage
Make.
Invention content
It is an object of the invention to：In view of the problems of the existing technology, a kind of direct current with DC over-voltage protection is provided
Window type work high temperature pulse power supply, overvoltage protection and the under-voltage protection effect for solving existing high temperature pulse power supply are bad,
The problem of easily causing power supply damage.
The goal of the invention of the present invention is achieved through the following technical solutions：
A kind of direct current window type work high temperature pulse power supply with DC over-voltage protection, which is characterized in that the power supply packet
Include current rectifying and wave filtering circuit, direct current under-voltage protecting circuit, DC over-voltage protection circuit, control IC, metal-oxide-semiconductor Q3 and boosting unit, institute
State boosting unit include primary coil and secondary coil, the DC over-voltage protection circuit include voltage-stabiliser tube ZD1 ', resistance R16,
The anode connection of voltage-stabiliser tube ZD4, capacitance C21, metal-oxide-semiconductor Q2, resistance R17 ', resistance R19 and metal-oxide-semiconductor Q1, the voltage-stabiliser tube ZD1 '
By the anode of resistance R16 connection voltage-stabiliser tubes ZD4, the voltage-stabiliser tube ZD4's is negative for the cathode output end of current rectifying and wave filtering circuit, cathode
Pole connects the cathode output end of current rectifying and wave filtering circuit, and the resistance R17 ' is connected in parallel on rectifying and wave-filtering electricity again after connecting with resistance R19
Between two output terminals on road, the grid of the metal-oxide-semiconductor Q2 is connected between the anode of resistance R16 and voltage-stabiliser tube ZD4, source electrode connects
Be connected to current rectifying and wave filtering circuit cathode output end, drain electrode be connected between resistance R17 ' and resistance R19, the one of the capacitance C21
The grid of end connection metal-oxide-semiconductor Q2, the cathode output end of other end connection current rectifying and wave filtering circuit, the grid connection of the metal-oxide-semiconductor Q1
To between resistance R17 ' and resistance R19, source electrode be connected to that the cathode output end of current rectifying and wave filtering circuit, to be connected to direct current under-voltage for drain electrode
Protect circuit.
As further scheme, the direct current under-voltage protecting circuit includes voltage-stabiliser tube ZD5 ', resistance R2, resistance R10 ' and electricity
Hold C16, the power input connection current rectifying and wave filtering circuit of the DC over-voltage protection circuit, the anode of the voltage-stabiliser tube ZD5 ' connects
The cathode output end of DC over-voltage protection circuit is connect, the cathode of voltage-stabiliser tube ZD5 ' is sequentially connected in series resistance R2, resistance R10 ' is followed by
The cathode output end of DC over-voltage protection circuit, the startup voltage end of the control IC be connected to resistance R2 and resistance R10 ' it
Between, the control terminal of IC is controlled to connect the grid of metal-oxide-semiconductor Q3, the source electrode connection DC over-voltage protection circuit of the metal-oxide-semiconductor Q3 is born
Pole output terminal, one end of the drain electrode connection primary coil of the metal-oxide-semiconductor Q3, the other end connection DC over-voltage protection of primary coil
The cathode output end of circuit, startup voltage end, the other end connection DC over-voltage of one end connection control IC of the capacitance C16 are protected
The cathode output end of protection circuit, the drain electrode of the metal-oxide-semiconductor Q1 are connected to resistance R10 '.
As further scheme, the voltage stabilizing value of the voltage-stabiliser tube ZD1 ' is 225V~230V, and voltage-stabiliser tube ZD1 ' is by 1~50
A voltage-stabiliser tube is connected in series.
As further scheme, the voltage stabilizing value of the voltage-stabiliser tube ZD4 is 10V~24V, and voltage-stabiliser tube ZD4 is steady by 1~30
Pressure pipe is connected in series.
As further scheme, the voltage stabilizing value of the voltage-stabiliser tube ZD5 ' is 150V~160V, and voltage-stabiliser tube ZD5 ' is by 1~10
A voltage-stabiliser tube is connected in series.
As further scheme, which further includes alternating current protection circuit, which includes capacitance C20, resistance R14, two
Pole pipe D9, diode D8, resistance R15 and resistance R18, the current rectifying and wave filtering circuit include capacitance C9 and diode D7, the electricity
Hold the both ends that C9 is connected in parallel on power supply, positive terminal connection positive pole, the negative pole end of the diode D7 connect voltage-stabiliser tube ZD5's '
Anode, positive terminal, the other end of one end connection diode D7 of the capacitance C20 pass through the negative of resistance R14 connection diodes D9
Pole, the anode connection power cathode of the diode D9, the anode of the diode D8 be connected to capacitance C20 and resistance R14 it
Between, negative pole end connect power cathode after being sequentially connected in series resistance R15 and resistance R18, the grid of the metal-oxide-semiconductor Q2 is connected to resistance
Between R15 and resistance R18.
As further scheme, the resistance R14 and resistance R15 are reduced to a resistance R14 ', and the capacitance C20 passes through
Resistance R14 ' connects diode D9 and diode D8 respectively.
As further scheme, the diode D7 is the diode that reversely pressure resistance is more than 600V；The capacitance C20 is electricity
Capacitance is in 0.01uF~0.1uF, and pressure resistance is more than the multi-layer ceramic capacitance of 600V；The capacitance C21 for capacitance 0.1uF~
The multi-layer ceramic capacitance of 1uF；The resistance R14 and resistance R15 is resistance value 10k Ω~100k Ω, and power is greater than or equal to
The resistance of 1/4W.
As further scheme, the resistance R14 ' is resistance value 10k Ω~100k Ω, and power is greater than or equal to 1/4W
Resistance.
Compared with prior art, the present invention has the following advantages：
1st, the present invention is more preferable for the effect of direct current under-voltage protection, in input undervoltage, does not give control IC power supplies,
The range of nominal tension is increased to the supply current of control IC, and product is made also reliably to start in the case of a high temperature；
2nd, the present invention is more preferable for the effect of DC over-voltage protection, in a manner that voltage-stabiliser tube adds sampling resistor, defeated
When entering electric voltage over press, larger electric current can be generated on sampling resistor, it at high temperature also can reliably working；
3rd, the present invention can also protect exchange abnormal voltage, in 0~380Vac entire scopes, all play anti-
Shield acts on, and operating temperature is up to 225 DEG C.
Description of the drawings
Fig. 1 is the DC protection circuit figure of existing high temperature pulse power supply；
Fig. 2 is the DC protection circuit figure of the present invention；
Fig. 3 is the circuit diagram of protection of increasing exchanges on the basis of the present invention；
Fig. 4 is the physical circuit figure of the present invention with direct current, exchange protection；
Fig. 5 is another physical circuit figure with direct current, the present invention of exchange protection.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
The present invention provides a kind of direct current window type work high temperature pulse power supply with DC over-voltage protection, as shown in Fig. 2,
The power supply is mainly by current rectifying and wave filtering circuit, direct current under-voltage protecting circuit, DC over-voltage protection circuit, control IC, metal-oxide-semiconductor Q3 and liter
Press unit, rectification unit, energy-storage units composition.Wherein, boosting unit is mainly made of primary coil and secondary coil.Direct current mistake
The power input connection current rectifying and wave filtering circuit of voltage protection circuit.Rectification unit connects boosting unit.Energy-storage units connect rectification
Unit.Energy-storage units are by switching connection load.
Direct current under-voltage protecting circuit is mainly made of voltage-stabiliser tube ZD5 ', resistance R2, resistance R10 ' and capacitance C16.Voltage-stabiliser tube
The cathode output end of the anode connection DC over-voltage protection circuit of ZD5 ', the cathode of voltage-stabiliser tube ZD5 ' are sequentially connected in series resistance R2, electricity
Resistance R10 ' is followed by the cathode output end of DC over-voltage protection circuit.The startup voltage end of control IC is connected to resistance R2 and resistance
Between R10 ', the control terminal of IC is controlled to connect the grid of metal-oxide-semiconductor Q3.The source electrode connection DC over-voltage protection circuit of metal-oxide-semiconductor Q3
Cathode output end, one end of the drain electrode connection primary coil of metal-oxide-semiconductor Q3, the other end connection DC over-voltage protection electricity of primary coil
The cathode output end on road.Startup voltage end, the other end connection DC over-voltage protection circuit of one end connection control IC of capacitance C16
Cathode output end.The voltage-stabiliser tube ZD5 ' of the present invention can be connected in series by 1~10 voltage-stabiliser tube, as long as after single or series connection
The sum of voltage stabilizing value is between 150V~160V.The resistance R10 ' of the present invention is total to by resistance R10 and one with other circuits
Resistance R11 is collectively formed.
In the present embodiment, the voltage stabilizing value of voltage-stabiliser tube ZD5 ' takes 150V (can be gone here and there in actual track by 2 voltage-stabiliser tubes ZD5, ZD65
Join), when input direct-current voltage is less than 150Vdc, voltage-stabiliser tube ZD5 ' does not puncture, and control IC is without startup voltage, it is impossible to work
Make.When input direct-current voltage is more than 150Vdc, voltage-stabiliser tube ZD5 ' breakdown, resistance R2 charges to capacitance C16, as capacitance C16 two
After startup threshold voltage of the terminal voltage more than control IC, control IC starts, main circuit work.Circuit is designed as specified straight when inputting
During galvanic electricity pressure (200~230Vdc), resistance R2 is 15~25mA to the charging current of capacitance C16.In this way, even if in high temperature 225
In the case of DEG C, the leakage current of IC is controlled to reach 10mA, control IC can also start.
Embodiment 2
In the present embodiment, a kind of DC over-voltage protection circuit is provided, remaining composition of power supply is consistent with embodiment, such as Fig. 2
It is shown.DC over-voltage protection circuit is mainly by voltage-stabiliser tube ZD1 ', resistance R16, voltage-stabiliser tube ZD4, capacitance C21, metal-oxide-semiconductor Q2, resistance
R17 ', resistance R19 and metal-oxide-semiconductor Q1 compositions.Cathode output end, the cathode of the anode connection current rectifying and wave filtering circuit of voltage-stabiliser tube ZD1 ' lead to
Cross the anode of resistance R16 connection voltage-stabiliser tubes ZD4.The cathode output end of the cathode connection current rectifying and wave filtering circuit of voltage-stabiliser tube ZD4.Resistance
R17 ' is connected in parallel on after connecting with resistance R19 again between two output terminals of current rectifying and wave filtering circuit.The grid of metal-oxide-semiconductor Q2 is connected to electricity
Between the anode of resistance R16 and voltage-stabiliser tube ZD4, source electrode is connected to the cathode output end of current rectifying and wave filtering circuit, drain electrode is connected to resistance
Between R17 ' and resistance R19.The grid of one end connection metal-oxide-semiconductor Q2 of capacitance C21, the cathode of other end connection current rectifying and wave filtering circuit
Output terminal.The grid of metal-oxide-semiconductor Q1 is connected between resistance R17 ' and resistance R19, source electrode is connected to the cathode of current rectifying and wave filtering circuit
Output terminal, drain electrode are connected to resistance R10 '.The voltage-stabiliser tube ZD1 ' of the present invention can be connected in series by 1~50 voltage-stabiliser tube, as long as
The sum of voltage stabilizing value after single or series connection is between 225V~230V.Voltage-stabiliser tube ZD4 can also be by 1~30 voltage-stabiliser tube string
Connection and, as long as it is single or series connection after voltage stabilizing value be 10V~24V.Resistance R17 ' can also have several resistance to be connected in series,
The present embodiment is composed in series using resistance R17 and resistance R20.
In the present embodiment, the voltage stabilizing value of voltage-stabiliser tube ZD1 ' take 225V (in actual track can by 3 voltage-stabiliser tube ZD1, ZD2,
ZD3 is connected in series), when input direct-current voltage is more than 230Vdc, voltage-stabiliser tube ZD1 ' breakdown, resistance R16 charges to capacitance C21,
When capacitance C21 both end voltages are more than metal-oxide-semiconductor Q2 threshold voltages, metal-oxide-semiconductor Q2 conductings drag down metal-oxide-semiconductor Q1 gate voltages, metal-oxide-semiconductor
Q1 is turned off, and main circuit does not work.
Embodiment 3
The present embodiment mainly increases alternating current protection circuit on the basis of embodiment 2, remaining composition and embodiment 2 one
It causes.The structure chart of the present embodiment as shown in Figure 3 and Figure 4, alternating current protection circuit mainly by capacitance C20, resistance R14, diode D9,
Diode D8, resistance R15 and resistance R18 compositions.The alternating current protection circuit shares capacitance C21 with DC over-voltage protection circuit.It is whole
It flows filter circuit and includes capacitance C9 and diode D7, capacitance C9 is connected in parallel on the both ends of power supply, the positive terminal connection electricity of diode D7
The anode of source anode, negative pole end connection voltage-stabiliser tube ZD5 '.Positive terminal, the other end of one end connection diode D7 of capacitance C20 leads to
Cross the cathode of resistance R14 connection diodes D9, and the anode connection power cathode of diode D9 (due to series connection, diode D9 and electricity
The position for hindering R14 is commutative).The anode of diode D8 is connected between capacitance C20 and resistance R14, negative pole end is sequentially connected in series electricity
Power cathode is connected after resistance R15 and resistance R18.The grid of metal-oxide-semiconductor Q2 is connected between resistance R15 and resistance R18.
The reversed pressure resistances such as diode D7, D8, D9 selection 1N4007, FR107, BYV26E are more than the diode of 600V.Capacitance
C20 is capacitance in 0.01uF~0.1uF, and pressure resistance is more than the multi-layer ceramic capacitance of 600V.Capacitance C21 exists for capacitance
The multi-layer ceramic capacitance of 0.1uF~1uF.Resistance R14 and resistance R15 is resistance value 10k Ω~100k Ω, and power is more than or waits
In the resistance of 1/4W.
In the present embodiment, due to C20 requirement high pressures in circuit, capacity is small, and C21 capacity requireds are big and resistance to be forced down, so
Heat safe ceramic condenser can be used in C20 and C321.0.01uF/1kV patch capacitors can be selected in C20, and C21 can be selected
0.47uF/50V patch capacitors.Even if input terminal alternating voltage is 380Vac (crest voltage 540V), also can reliably working.
When input terminal misconnection enters alternating voltage, when alternating voltage rises (0 °~90 ° of sinusoidal waveform), electric current is through capacitance
C20, diode D8, resistance R15, capacitance C21 charge to capacitance C20 and capacitance C21.(the sinusoidal waveform when alternating voltage declines
90 °~270 °), electric current discharges to capacitance C20 through diode D9, resistance R14, capacitance C20.(sinusoidal waveform when rising again
270 °~2+90 ° of π), and charge to capacitance C20 and capacitance C21.So in cycles, capacitance C21 both ends can maintain an electricity
Metal-oxide-semiconductor Q2 is connected in pressure, drags down metal-oxide-semiconductor Q1 gate voltages, metal-oxide-semiconductor Q1 shutdowns, main circuit does not work, anti-so as to play exchange
Shield acts on.
Embodiment 4
The present embodiment is the improvement based on embodiment 3, and circuit structure is as shown in figure 5, mainly by resistance R14 and resistance
R15 is reduced to a resistance R14 '.Capacitance C20 connects diode D9 and diode D8 respectively by resistance R14 '.Resistance R14 '
For resistance value 10k Ω~100k Ω, and power is greater than or equal to the resistance of 1/4W.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, it is noted that all
All any modification, equivalent and improvement made within the spirit and principles in the present invention etc. should be included in the guarantor of the present invention
Within the scope of shield.
Claims (9)
1. a kind of direct current window type work high temperature pulse power supply with DC over-voltage protection, which is characterized in that the power supply includes
Current rectifying and wave filtering circuit, direct current under-voltage protecting circuit, DC over-voltage protection circuit, control IC, metal-oxide-semiconductor Q3 and boosting unit, it is described
Boosting unit includes primary coil and secondary coil, and the DC over-voltage protection circuit includes voltage-stabiliser tube ZD1 ', resistance R16, steady
Pressure pipe ZD4, capacitance C21, metal-oxide-semiconductor Q2, resistance R17 ', the anode connection of resistance R19 and metal-oxide-semiconductor Q1, the voltage-stabiliser tube ZD1 ' are whole
Cathode output end, the cathode of stream filter circuit pass through the anode of resistance R16 connection voltage-stabiliser tubes ZD4, the cathode of the voltage-stabiliser tube ZD4
The cathode output end of current rectifying and wave filtering circuit is connected, the resistance R17 ' is connected in parallel on current rectifying and wave filtering circuit again after connecting with resistance R19
Two output terminals between, the grid of the metal-oxide-semiconductor Q2 is connected between the anode of resistance R16 and voltage-stabiliser tube ZD4, source electrode connection
Cathode output end, drain electrode to current rectifying and wave filtering circuit are connected between resistance R17 ' and resistance R19, one end of the capacitance C21
The grid of metal-oxide-semiconductor Q2, the cathode output end of other end connection current rectifying and wave filtering circuit are connected, the grid of the metal-oxide-semiconductor Q1 is connected to
Between resistance R17 ' and resistance R19, source electrode is connected to the cathode output end of current rectifying and wave filtering circuit, drain electrode is connected to the under-voltage guarantor of direct current
Protection circuit.
2. a kind of direct current window type work high temperature pulse power supply with DC over-voltage protection according to claim 1,
It is characterized in that, the direct current under-voltage protecting circuit includes voltage-stabiliser tube ZD5 ', resistance R2, resistance R10 ' and capacitance C16, the direct current
The power input connection current rectifying and wave filtering circuit of overvoltage crowbar, the anode connection DC over-voltage protection of the voltage-stabiliser tube ZD5 '
The cathode output end of circuit, the cathode of voltage-stabiliser tube ZD5 ' is sequentially connected in series resistance R2, resistance R10 ' is followed by DC over-voltage protection electricity
The cathode output end on road, the startup voltage end of the control IC are connected between resistance R2 and resistance R10 ', control the control of IC
The grid of end connection metal-oxide-semiconductor Q3, the cathode output end of the source electrode connection DC over-voltage protection circuit of the metal-oxide-semiconductor Q3, the MOS
One end of the drain electrode connection primary coil of pipe Q3, the anode output of the other end connection DC over-voltage protection circuit of primary coil
End, startup voltage end, the cathode of other end connection DC over-voltage protection circuit of one end connection control IC of the capacitance C16 are defeated
Outlet, the drain electrode of the metal-oxide-semiconductor Q1 are connected to resistance R10 '.
3. a kind of direct current window type work high temperature pulse power supply with DC over-voltage protection according to claim 2,
Be characterized in that, the voltage stabilizing value of the voltage-stabiliser tube ZD1 ' is 225V~230V, voltage-stabiliser tube ZD1 ' connected by 1~50 voltage-stabiliser tube and
Into.
4. a kind of direct current window type work high temperature pulse power supply with DC over-voltage protection according to claim 2,
It is characterized in that, the voltage stabilizing value of the voltage-stabiliser tube ZD4 is 10V~24V, and voltage-stabiliser tube ZD4 is connected in series by 1~30 voltage-stabiliser tube.
5. a kind of direct current window type work high temperature pulse power supply with DC over-voltage protection according to claim 2,
Be characterized in that, the voltage stabilizing value of the voltage-stabiliser tube ZD5 ' is 150V~160V, voltage-stabiliser tube ZD5 ' connected by 1~10 voltage-stabiliser tube and
Into.
6. a kind of direct current window type work high temperature pulse power supply with DC over-voltage protection according to claim 2,
It is characterized in that, which further includes alternating current protection circuit, which includes capacitance C20, resistance R14, diode D9, diode
D8, resistance R15 and resistance R18, the current rectifying and wave filtering circuit includes capacitance C9 and diode D7, the capacitance C9 are connected in parallel on power supply
Both ends, the positive terminal connection positive pole of the diode D7, the anode of negative pole end connection voltage-stabiliser tube ZD5 ', the capacitance
Positive terminal, the other end of one end connection diode D7 of C20 passes through the cathode of resistance R14 connection diodes D9, the diode
The anode connection power cathode of D9, the anode of the diode D8 is connected between capacitance C20 and resistance R14, negative pole end successively
Connect power cathode after series resistance R15 and resistance R18, the grid of the metal-oxide-semiconductor Q2 be connected to resistance R15 and resistance R18 it
Between.
7. a kind of direct current window type work high temperature pulse power supply with DC over-voltage protection according to claim 6,
It is characterized in that, the resistance R14 and resistance R15 are reduced to a resistance R14 ', and the capacitance C20 is connected respectively by resistance R14 '
Meet diode D9 and diode D8.
8. a kind of direct current window type work high temperature pulse power supply with DC over-voltage protection according to claim 6,
It is characterized in that, the diode D7 is the diode that reversely pressure resistance is more than 600V；The capacitance C20 for capacitance 0.01uF~
0.1uF, and pressure resistance is more than the multi-layer ceramic capacitance of 600V；The capacitance C21 is multi-layer ceramics of the capacitance in 0.1uF~1uF
Capacitance；The resistance R14 and resistance R15 is resistance value 10k Ω~100k Ω, and power is greater than or equal to the resistance of 1/4W.
9. a kind of direct current window type work high temperature pulse power supply with DC over-voltage protection according to claim 7,
It is characterized in that, the resistance R14 ' is resistance value 10k Ω~100k Ω, and power is greater than or equal to the resistance of 1/4W.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711435648.1A CN108199566A (en) | 2017-12-26 | 2017-12-26 | Direct current window type work high temperature pulse power supply with DC over-voltage protection |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711435648.1A CN108199566A (en) | 2017-12-26 | 2017-12-26 | Direct current window type work high temperature pulse power supply with DC over-voltage protection |
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| CN108199566A true CN108199566A (en) | 2018-06-22 |
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| CN201711435648.1A Withdrawn CN108199566A (en) | 2017-12-26 | 2017-12-26 | Direct current window type work high temperature pulse power supply with DC over-voltage protection |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108832601A (en) * | 2018-09-03 | 2018-11-16 | 北京有感科技有限责任公司 | A kind of overvoltage crowbar and its application |
| CN109245025A (en) * | 2018-10-16 | 2019-01-18 | 常熟开关制造有限公司(原常熟开关厂） | Trip circuit, trip gear, breaker |
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| CN201490685U (en) * | 2009-07-24 | 2010-05-26 | 深圳市中兴移动通信有限公司 | Multifunction power protection circuit |
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| CN104242249A (en) * | 2014-09-17 | 2014-12-24 | 广州金升阳科技有限公司 | Protective circuit of switching power supply |
| CN105634263A (en) * | 2016-04-12 | 2016-06-01 | 上海斐讯数据通信技术有限公司 | Protection circuit self-adaptive to input voltage |
| CN205986102U (en) * | 2016-08-30 | 2017-02-22 | 广州小百合信息技术有限公司 | Protection circuit for power supply |
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| CN201490685U (en) * | 2009-07-24 | 2010-05-26 | 深圳市中兴移动通信有限公司 | Multifunction power protection circuit |
| CN102270831A (en) * | 2011-07-26 | 2011-12-07 | 广州日滨科技发展有限公司 | Wide-voltage power protection device of intelligent vehicle-mounted terminal |
| CN202309020U (en) * | 2011-10-27 | 2012-07-04 | 深圳茂硕电子科技有限公司 | Intelligently-controlled input overvoltage protection circuit and switch power source adopting same |
| CN103887975A (en) * | 2012-12-21 | 2014-06-25 | 三垦电气株式会社 | Switching Power-supply Apparatus |
| CN104065042A (en) * | 2013-03-21 | 2014-09-24 | 昂纳信息技术（深圳）有限公司 | Power supply input protection circuit and method |
| CN104143906A (en) * | 2014-07-28 | 2014-11-12 | 武汉中元通信股份有限公司 | Medium-power power source module for mobile wireless communication device |
| CN104242249A (en) * | 2014-09-17 | 2014-12-24 | 广州金升阳科技有限公司 | Protective circuit of switching power supply |
| CN105634263A (en) * | 2016-04-12 | 2016-06-01 | 上海斐讯数据通信技术有限公司 | Protection circuit self-adaptive to input voltage |
| CN205986102U (en) * | 2016-08-30 | 2017-02-22 | 广州小百合信息技术有限公司 | Protection circuit for power supply |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108832601A (en) * | 2018-09-03 | 2018-11-16 | 北京有感科技有限责任公司 | A kind of overvoltage crowbar and its application |
| CN109245025A (en) * | 2018-10-16 | 2019-01-18 | 常熟开关制造有限公司(原常熟开关厂） | Trip circuit, trip gear, breaker |
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