CN107370388A - A kind of DC D/C powers for turning low pressure for high pressure - Google Patents
A kind of DC D/C powers for turning low pressure for high pressure Download PDFInfo
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- CN107370388A CN107370388A CN201710729837.3A CN201710729837A CN107370388A CN 107370388 A CN107370388 A CN 107370388A CN 201710729837 A CN201710729837 A CN 201710729837A CN 107370388 A CN107370388 A CN 107370388A
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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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
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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
-
- 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
- H02M1/325—Means for protecting converters other than automatic disconnection with means for allowing continuous operation despite a fault, i.e. fault tolerant converters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The present invention relates to electronic technology field; provide a kind of DC D/C powers for turning low pressure for high pressure; including the series-parallel some change-over circuits and 15V power supply circuits of divider resistance, signal circuit and output short circuit protection circuit; each change-over circuit is connected with high-voltage power supply by divider resistance and including peak unit, oscillating unit, rectification filtering unit and driver transformer and the driver element of disappearing respectively; it is series connection between each divider resistance, rectification filtering unit is parallel connection；Driver element includes first, second tunnel driving bridge module; first, second road drive axle Module connection signal circuit; 15V power supply circuits connect between rectification filtering unit and signal circuit; output short circuit protection circuit connects between rectification filtering unit and 15V power supply circuits; solves the technical problem that high direct voltage is difficult to directly utilize by previous constructions; simple in construction, the high effect of transformation efficiency is reached.
Description
Technical field
The present invention relates to electronic technology field, especially provides a kind of DC-DC power source for turning low pressure for high pressure.
Background technology
At present, because in the market is also no or is also not equipped with the high pressure resistant switching tube of dependable performance.Such as metal-oxide-semiconductor or
IGBT can not fully meet single tube or two-tube, and reach the pressure-resistant requirements of 10kV.So switching tube be used in series into
Whole circuit design focus and difficult point in this problem.Selected as switching tube, it is general using the conventional pressure-resistant MOS of 500V-1000V
Pipe.Even if the metal-oxide-semiconductor of the actually same same production batch of model also is difficult to ensure its internal resistance and ON time complete one
Cause, this just determines that the series connection of metal-oxide-semiconductor can not simply use (such as this kind of device of resistance, electric capacity) to be directly used in series.
The content of the invention
In order to solve the above technical problems, it is a primary object of the present invention to provide a kind of DC-DC for turning low pressure for high pressure
Power supply.This product DC-DC power source is connected using double tube positive exciting multimode, and square-wave signal acts on simultaneously caused by SG3525 chips
Multiple concussion modules, the purpose of multichannel module while synchronous working is reached with this, is made so as to solve mos pipes and can not directly connect
Problem.Meanwhile the low-voltage direct output end output work used in parallel that larger output circuit can be provided, increase power supply
Rate.
To reach above-mentioned purpose, the technical scheme that the present invention applies is：Provide a kind of DC-DC for turning low pressure for high pressure
Power supply, it include by divider resistance press mutually series-parallel some change-over circuits and a 15V power supply circuits, a signal circuit with
And an output short circuit protection circuit, each change-over circuit are established by divider resistance and high-voltage power supply connect respectively, and include disappearing respectively
Peak unit, oscillating unit, rectification filtering unit and driver transformer and driver element, it is series connection between each divider resistance, it is whole
It is in parallel between stream filter unit, wherein：Divider resistance connects between high-voltage power supply and the peak unit that disappears, and oscillating unit is in the peak list that disappears
Connected between member and rectification filtering unit, while driver transformer establishes connection between driver element and oscillating unit, driving
Unit includes first, second tunnel driving bridge module, first, second road drive axle Module connection signal circuit, while 15V power supply electricity
Road is connected between rectification filtering unit and signal circuit, and output short circuit protection circuit is powered in rectification filtering unit and 15V
Connected between circuit.
It is preferred in embodiments of the present invention：Divider resistance connection disappears peak unit and the partial pressure that is formed disappears peak module.
It is preferred in embodiments of the present invention：Partial pressure disappears peak module divider resistance, electric capacity C12, C13, C14, resistance R14 and electricity
Feel L3, wherein：High-voltage power supply is 10kv, and one end connection of high-voltage power supply divider resistance, electric capacity C12 and inductance L3, electric capacity C13, C14 divide
Other one end is all connected with the inductance L3 other end, and the electric capacity C13 other end is connected with resistance R14, and the divider resistance other end is through electricity
Hold the C12 other end, then the other end with electric capacity C14 after the resistance R14 other end is connected.
It is preferred in embodiments of the present invention：Shake module bag FET Q2, Q4, diode D2, D5, D10, D12, resistance
R4, R6, R17, R18 and transformer T2, wherein：FET Q2, Q4 be N-channel FET, FET Q2 drain electrode
Connect with transformer T2 one end, the transformer T2 other end connects with FET Q4 source electrode.
It is preferred in embodiments of the present invention：Filter unit is connected with transformer T2 secondary, and including diode D6, D9,
Polarized electric capacity C10, C11 and inductance L4, wherein：Diode D6 positive poles are connected with transformer T2 secondary, negative pole and inductance L4
It is connected, the polarized electric capacity C11 anodes connection inductance L4 other end simultaneously provides 24V power supplys, negativing ending grounding GND, in diode D6
It is connected with diode D9 negative pole and polarized electric capacity C10 anodes in circuit between inductance L4, and diode D9 positive pole
With polarized electric capacity C10 negativing ending groundings GND.
It is preferred in embodiments of the present invention：Driver transformer includes first, second connection end QA, QB, first, second connection
End QA, QB connect the output end of first, second driving bridge module respectively；First driving bridge module includes chip one, the second driving
Bridge module includes chip three, and chip one and chip three use the cake cores of ICL 7667, and first, second driving bridge module wraps respectively
The 1st to 8 pin is included, wherein：The pin INA of chip 1 the 2nd connects with the pin INB of chip 1 the 4th, the pin V- of chip 1 the 3rd ground connection, while chip
One the 5th, 7 pin OUTB, OUTA merge to form output end QA, and the pin V+ connections 15V of chip 1 the 6th is that chip one is powered, polarized electricity
Hold C2 anodes and connect the 6th pin V+, negativing ending grounding；The pin INA of chip 3 the 2nd connects with the pin INB of chip 3 the 4th, the pin V- of chip 3 the 3rd
Ground connection, while chip 3 the 5th, 7 pin OUTB, OUTA merge to form the 6th pin V+, the pin V+ connections 15V of chip 3 the 6th is that chip three supplies
Electricity, polarized electric capacity C17 anodes connection output end QB, negativing ending grounding.
It is preferred in embodiments of the present invention：Signal circuit include the resistance R2, R5 on chip two and periphery, R7, R11, R12,
R13, electric capacity C3, C4, C15, C16 and C18, wherein：The frequency of chip two uses 28kHz, and it includes the 1st to the 16th pin, wherein：
Resistance R2 one end connects voltage output end OUT and forms bleeder circuit with resistance R5, and the bleeder circuit with the 1st pin when being connected
It is connected by electric capacity C16 with the 9th pin；Resistance R11 one end is connected with the 6th pin, other end ground connection；Electric capacity C15 one end connects respectively
5th pin and resistance R12 one end, electric capacity C15 other ends ground connection, the resistance R12 other ends connect the 7th pin；Electric capacity C4 one end respectively with
2nd pin and the connection of the 16th pin, electric capacity C4 other ends ground connection；Electric capacity C18 one end is connected with the 8th pin, the electric capacity C18 other ends and company
Ground；Resistance R7 one end is connected with the 15th pin and 15V power supplies respectively, and the resistance R7 other ends are connected with the 13rd pin；Resistance R13 one end with
10th pin connects, the resistance R13 other ends and ground connection；11st pin, the 14th pin be respectively chip two two signal output port A,
B；12nd pin and ground connection.
It is preferred in embodiments of the present invention：15V power supply circuits are started by additional startup power supply, then utilize power supply itself
The DC low-voltage converted, 15V power supply circuits are realized by three terminal regulator, DC circuit includes relay, polarized electric capacity
C1 and three terminal regulator, wherein：External startup power supply is connected to startup power supply and three terminal regulator through relay switch pin
Between input, three terminal regulator earth terminal is grounded and connects relay grounding leg, polarized electric capacity C1 anode be connected to after
Between electric switch pin and three terminal regulator input and negativing ending grounding, three terminal regulator output end is set to export 15V stabilized power sources,
Three terminal regulator output end connects the 15th pin of chip two, and relay is 24V relays.
It is preferred in embodiments of the present invention：Output circuit includes triode QT1, QT2 and resistance R66, R68, R69, wherein
When output current is normal, pass through resistance R67, R68 partial pressure so that triode QT1 transmitting electrode potential is higher than base potential, hair
Emitter-base bandgap grading is reverse-biased, and then triode QT1 is in by state, makes triode QT2 in the conduction state；When short circuit occurs for output end
When, output voltage is close to zero, and regards triode QT1 grounded emitters as, and now triode QT1 is turned on, and makes triode QT2 base stages
Voltage is opened a way close to zero triode QT2.
It is preferred in embodiments of the present invention：Output circuit has 24V connection ends, and relay and inductance L4 have 24V respectively
Pin is held, wherein：24V connection ends also connect inductance L424V ends pin when connecting relay 24V end pin.
Compared with prior art, it has the advantages that the present invention：The DC-DC power source is used for HVDC transmission line,
High direct voltage is converted to the low-voltage direct needed for electrical equipment.It is applied to line feeder fiber composite overhead ground wire, is used for
The electrical equipment of remote high-voltage direct current (10KV) power supply, while also provide safety without the unattended electrical equipment of civil power for field
Low-tension supply, install and use simply, solve the problem that high direct voltage is difficult to directly utilize, before having wide market development
Scape.
Brief description of the drawings
Fig. 1 is the frame structure schematic diagram of the embodiment of the present invention.
Fig. 2 is the electrical block diagram of the embodiment of the present invention.
Fig. 3 is that partial pressure disappears the circuit diagram of peak module in Fig. 2.
Fig. 4 is the circuit diagram that unit is shaken in Fig. 2.
Fig. 5 is the circuit diagram of output unit in Fig. 2.
Fig. 6 is the circuit diagram of driver transformer in Fig. 2.
Fig. 7 a and Fig. 7 b form the driver element in Fig. 2, wherein：Fig. 7 a are the first driving bridge module schematic diagrams, and Fig. 7 b are
Second driving bridge module schematic diagram.
Fig. 8 is the schematic diagram of signal circuit in Fig. 2.
Fig. 9 is the schematic diagram of DC circuit in Fig. 2.
Figure 10 is the schematic diagram of output circuit in Fig. 2.
Embodiment
Although the present invention can easily show as various forms of embodiments, it is shown in the drawings and in this explanation
What be will be explained in book is only some of specific embodiments, while is understandable that this specification is construed as this hair
Bright principle it is exemplary illustrated, and be not intended to limit the invention to it is illustrated herein as.
Thus, a feature pointed in this specification by illustrate one embodiment of the present of invention one of them
Feature, rather than imply that each embodiment of the present invention must have illustrated feature.Further it is to be noted that be this explanation
Book describes many features.Although some features can be combined to show possible system design, these features
It can also be used for other combinations that explanation is not known.Thus, unless otherwise indicated, illustrated combination is not intended to limit.
In the embodiment shown in the figures, the instruction (such as upper, lower, left, right, front and rear) in direction is explaining the present invention
Various assemblies structure and motion be not absolute but relative.When these components are in position shown in the drawings, this
A little explanations are suitable.If the explanation of the position of these components changes, the instruction in these directions also correspondingly changes
Become.
Below in conjunction with the accompanying drawing of this specification, give presently preferred embodiments of the present invention further elaboration.
Refer to Fig. 1 and combination is as shown in fig.2, Fig. 1 is the frame structure schematic diagram of the embodiment of the present invention, Fig. 2 is this
The electrical block diagram of inventive embodiments.Figure includes pressing mutually series-parallel He of some change-over circuits 10 by divider resistance
The signal generating circuit (hereinafter referred to as " signal circuit ") 30 of one 15V power supply circuits (hereinafter referred to as " power supply circuit ") 20, one and
One output short circuit protection circuit (hereinafter referred to as " output circuit ") 40, wherein：Each change-over circuit 10 passes through divider resistance 11 respectively
Establish and connect with high-voltage power supply HV, be series connection between each divider resistance 11, be in parallel between each rectification filtering unit 14, in this implementation
In example, each change-over circuit 10 includes disappear peak unit 12, oscillating unit 13, rectification filtering unit (hereinafter referred to as " rectifying and wave-filtering list
Member " or referred to as " filter unit ") 14 and driver transformer 15 and driver element 16, wherein：Divider resistance 11 is in high-voltage power supply HV
Connection is established between the peak unit 12 that disappears, sequentially oscillating unit 13 connects in the foundation between peak unit 12 and filter unit 14 that disappears,
Driver transformer 15 establishes connection between driver element 16 simultaneously, and driver element 16 includes first, second tunnel driving bridge module
161st, 162, first, second tunnel driving bridge module 161,162 connects the different end pin (such as Fig. 2) of signal circuit 30 respectively, simultaneously
Power supply circuit 20 establishes connection between filter unit 14 and signal circuit 30, and output circuit 40 is in filter unit 14 and power supply
Connected between circuit 20, high direct voltage effectively can be converted into DC low-voltage by these structures construction, so as to solve out
Close and manage pressure-resistant technical problem.
Refer to Fig. 1 and Fig. 2 and combination is as shown in fig.3, Fig. 3 is that divider resistance 11 connects the shape of peak unit 12 that disappears in Fig. 2
Into partial pressure disappear the structural representation of peak module (also referred to as resistance capacitance partial pressure disappear peak circuit), the disappear effect of peak module of partial pressure is straight
Stream high pressure partial pressure and disappear peak filtering, due to the present embodiment by some partial pressures disappear peak module and it is some concussion unit 13 form, be
Partial pressure in each concussion module 13 of guarantee is uniform, need to be by divider resistance 11R9) shake the partial pressure of unit 13, remaining device to be each
The effect of part (such as electric capacity C12, C13 and C14 and resistance 14, inductance L3) be disappear peak, filtering, and avoid when input height be pressed with it is prominent
Cause to shake the damage of unit 13 during right change, its circuit form is：High-voltage power supply (for 10kv voltages) and divider resistance 11, electricity
Hold C12 and inductance L3 one end connection, electric capacity C13, C14 one end are all connected with the inductance L3 other end, the electric capacity C13 other end
Be connected with resistance R14, the other end of the other end of divider resistance 11 through electric capacity C12, then after the resistance R14 other end with electric capacity
The C14 other end is connected.
Refer to Fig. 1 and Fig. 2 and combination as shown in fig.4, Fig. 4 be in Fig. 2 shake unit 13 circuit structure diagram, concussion
Bag FET Q2, the Q4 of module 20 and diode D2, D5, D10, D12 and resistance R4, R6, R17, R18 and transformer T2, its
In：FET Q2, Q4 are the FET of N-channel, and FET Q2 drain electrode connects with transformer T2 one end, transformer
The T2 other end connects with FET Q4 source electrode.Diode D2, the drive circuit that resistance R4, R6 are FET Q2,
D12, R17, R18 are FET Q4 drive circuit.Transformer T2 employed in the present embodiment is high frequency transformer, can be incited somebody to action
High direct voltage on concussion unit 13 is converted into required DC low-voltage.The pressure-resistant of transformer T2 needs to be higher than input voltage,
Otherwise transformer T2 can be caused to puncture, other components are damaged and lead to not use.In the present embodiment, diode D5, D10 is
The fly-wheel diode of normal shock transformer, magnetic reset is carried out to transformer T2 within each cycle of oscillation, prevent transformer T2 from occurring
Magnetic saturation, ensure to shake component normal work with this.
Refer to Fig. 1 and Fig. 2 and combination is as shown in fig.5, Fig. 5 is the electrical block diagram of filter unit 14 in Fig. 2.
Filter unit 14 is connected with the high frequency transformer T2 of (Fig. 4) concussion unit 13 secondary and (is allowed to form halfwave rectifier) in figure, and two
Pole pipe D9 prevents backward voltage from damaging circuit, finally gives the small DC low-voltage of stable ripple, and its circuit form includes two poles
D6, D9, polarized electric capacity C10, C11 and inductance L4 are managed (for commutation diode), wherein：Diode D6 positive poles and high frequency transformer
T2 secondary is connected, and negative pole is connected with inductance L4, and the polarized electric capacity C11 anodes connection inductance L4 other end simultaneously provides 24V electricity
Source, negativing ending grounding GND, diode D9 negative pole and polarized electric capacity are connected with the circuit between diode D6 and inductance L4
C10 anodes, and diode D9 positive pole and polarized electric capacity C10 negativing ending groundings GND.
Refer to Fig. 1 and Fig. 2 and combination is as shown in fig.6, Fig. 5 is the circuit structure signal of driver transformer 15 in Fig. 2
Figure, driver transformer 15 includes first, second connection end QA, QB in figure, first, second connection end QA, QB connect first respectively,
Output end QA, QB of second driving bridge module (or claiming " first, second drive axle integrated circuit " respectively) 161,162, is allowed to sharp
Two groups of secondary coils for encouraging transformer 15 produce completely the same drive waveforms.Reach smaller driving current and isolation high drive
Purpose, the degree of reliability of circuit is improved with this.The primary and secondary of driver transformer 15 is pressure-resistant to be higher than input voltage.
Refer to Fig. 1 and Fig. 2 and with reference to refering to shown in Fig. 7 a and Fig. 7 b, Fig. 7 a and Fig. 7 b are first, second driving respectively
Bridge module 161,162 electrical block diagrams, both collectively constitutes driver element 16, first, second driving bridge module 161,
162 driving bridge signal respectively is all from Fig. 2 two signal output parts of the IC2 of chip two in signal circuit 30, their shapes
It is complementary into waveform.Because the IC2 of chip two driving force is limited, excessive FET Q2, Q4 ... can not be directly driven, is driven
It is to drive several FETs that the effect of moving cell 16, which is exactly, and provides enough electric currents with this and truly transmit without loss
Oscillator signal, the circuit form of its driver element 16 are：First, second driving bridge module 161,162 respectively, the first drive axle
Module 161 includes the IC1 of chip one, and the second driving bridge module 162 includes chip two IC2, the IC1 of chip one and the IC2 of chip two is adopted
With the cake cores of ICL 7667, first, second driving bridge module 161,162 respectively includes the 1st to 8 pin, wherein：First driving bridge module
161 structure type is that the IC1 of chip one the 2nd pin INA and one IC1 of chip the 4th pin INB is connected, and the pin V- of one IC1 of chip the 3rd connect
Ground, while the IC1 the 5th of chip one, 7 pin OUTB, OUTA merge to form output end QA, the pin V+ connection power supply modules 15V of chip 1 the 6th
For chip power supply；Polarized electric capacity C2 anodes connect the 6th pin V+, negativing ending grounding；The structure type base of second driving bridge module 162
In the structure type of the first driving bridge module 161, unique difference is that polarized electric capacity C17 substitutes polarized electric capacity C2, its anode
Connect the 6th pin V+, negativing ending grounding.
Refer to Fig. 1 and Fig. 2 and combination is as shown in fig.8, Fig. 8 is signal circuit structural representation, signal circuit in figure
20 include the IC2 of chip two and multiple resistance (such as R2, R5, R7, R11, R12, R13) on periphery and multiple electric capacity (C3, C4, C15,
C16 and C18), wherein：The IC2 of the present embodiment chip two frequency uses 28kHz；Resistance R2, R5 are feedback resistance, are led to after partial pressure
Cross the IC2 internal amplifiers of chip two relatively the dutycycle for exporting square wave is adjusted, the IC2 of chip two uses SG3525 cores
Piece, including the 1st to the 16th pin, it is with multiple resistance on periphery and the circuit form of multiple electric capacity：Resistance R2 one end connection
Voltage output end OUT simultaneously forms partial pressure feedback circuit with resistance R5, and partial pressure feedback circuit with the 1st pin INV INPUP when being connected
It is connected also by electric capacity C16 with the 9th pin COM；But resistance R11 determines the frequency of signal, resistance R12 for adjustable resistance with C15
Dead time is determined, its circuit form is：Resistance R11 one end is connected with the 6th pin RT, other end ground connection；Electric capacity C15 one end point
Not Lian Jie the 5th pin CT and connection resistance R12 one end, electric capacity other end ground connection, the resistance R12 other ends connect the 7th pin
DISCHARGE；Electric capacity C4 one end is connected with the 2nd pin NONINV INPUT and the 16th pin VREF respectively, electric capacity C4 other ends ground connection；
Electric capacity C18 one end is connected with the 8th pin SOFT START, electric capacity C18) other end is connected to ground；Resistance R7 one end is respectively with the 15th
Pin VCC is connected with power supply module 15V, and the resistance R7 other ends are connected with the 13rd pin VCC；Resistance R13 one end and the 10th pin
SHUTDOWN connections, the resistance R13 other ends link with ground；11st pin OUTPUT A, the 14th pin OUTPUTB are respectively the two of chip
Individual signal output port A, B；12nd pin GROND is connected to ground.
Refer to Fig. 1 and Fig. 2 and combination is as shown in fig.9, Fig. 9 is the structural representation of power supply circuit 20, power supply circuit 20
It is 15V power supply circuits.Because DC-DC power source of the present invention is that DC high voltage is directly powered, therefore chip IC 2 (model SG3525)
And the 15V voltages needed for concussion unit 13 are difficult to obtain, therefore need additional startup power supply.After circuit start, power supply is recycled certainly
The DC low-voltage that body is converted, stable 15V is obtained by three terminal regulator (model 78L15 or 7815).It is high to connect direct current
After pressure, startup power supply only works several seconds, after circuit normal work, switches to itself DC low-voltage to power immediately, after
The continuous work for maintaining oscillating circuit, so as to extend the service life of startup power supply.In the present embodiment, the composition of power supply circuit 20
And structure type includes：The external startup power supply VCC of relay Relay-spdt, (polarized electric capacity C1 is adopted a polarized electric capacity C1
With 35v470uf types) and three terminal regulator VR1 (model 78L15 or 7815), wherein：External startup power supply is through relay switch K1
Pin is connected between startup power supply and three terminal regulator input Vin, three terminal regulator earth terminal GND be grounded and connect after
Electrical equipment grounding leg, polarized electric capacity C1 anode be connected between relay switch K1 pin and three terminal regulator input Vin and
Negativing ending grounding, therefore three terminal regulator output end vo ut is exported 15V stabilized power sources, in the present embodiment, three terminal regulator is defeated
Go out the 15th pin of end connection chip two, provide stabilized power source as chip, in the present embodiment, Relay-spdt relays are
24V relays.
Refer to Fig. 1 and Fig. 2 and combination is as shown in fig.10, Figure 10 is the output short circuit protection circuit of power supply in Fig. 2
Structural representation, referred to as " output circuit ", the overcurrent protection of output circuit 40 be by triode QT1, QT2, resistance R66, R68,
R69 is formed.When output current is normal, acted on by R67, R68 partial pressure so that triode QT1 transmitting electrode potential is higher than base
Electrode potential, emitter stage is reverse-biased, and then triode QT1 is in the conduction state by state, triode QT2.When output end is sent out
When raw short-circuit, output voltage, which is close to zero, can regard triode QT1 grounded emitters as, and now triode QT1 is turned on, so that three
Pole pipe QT2 base voltages are opened a way close to zero triode QT2, so as to reach the purpose of short-circuit protection, in the present embodiment, output electricity
Road 40 is connects inductance L4 24V power supplys, while output circuit 40 inputs 24V power supplys to relay, and short-circuit protection is realized with this
Purpose.
Claims (10)
1. a kind of DC-DC power source for turning low pressure for high pressure, including mutually series-parallel some conversion electricity are pressed by divider resistance
A road and 15V power supply circuits, an a signal circuit and output short circuit protection circuit, wherein：Each change-over circuit is respectively by dividing
Piezoresistance is established with high-voltage power supply and connected, and includes disappear peak unit, oscillating unit, rectification filtering unit and driver transformer respectively
And driver element, it is series connection between each divider resistance, is in parallel between current rectifying and wave filtering circuit, it is characterized in that：Divider resistance is in height
Connected between potential source and the peak unit that disappears, oscillating unit is connected between peak unit and rectification filtering unit disappearing, while encourages transformation
Device establishes connection between driver element and oscillating unit, and driver element includes first, second tunnel driving bridge module, and first, the
Two road drive axle Module connection signal circuits, while 15V power supply circuits connect between rectification filtering unit and signal circuit, and
Output short circuit protection circuit connects between rectification filtering unit and 15V power supply circuits.
2. DC-DC power source as claimed in claim 1, it is characterized in that：The partial pressure that divider resistance connects disappear peak unit and formation disappears
Peak module.
3. DC-DC power source as claimed in claim 2, it is characterized in that：Partial pressure disappears peak module divider resistance, electric capacity C12, C13,
C14, resistance R14 and inductance L3, wherein：High-voltage power supply is 10kv, high-voltage power supply and divider resistance, electric capacity C12 and inductance L3 one end
Connection, electric capacity C13, C14 one end are all connected with the inductance L3 other end, and the electric capacity C13 other end is connected with resistance R14, partial pressure
The other end of the resistance other end through electric capacity C12, then the other end with electric capacity C14 after the resistance R14 other end are connected.
4. DC-DC power source as claimed in claim 3, it is characterized in that：Shake module bag FET Q2, Q4, diode D2,
D5, D10, D12, resistance R4, R6, R17, R18 and transformer T2, wherein：FET Q2, Q4 be N-channel FET, field
Effect pipe Q2 drain electrode connects with transformer T2 one end, and the transformer T2 other end connects with FET Q4 source electrode.
5. DC-DC power source as claimed in claim 4, it is characterized in that：Rectification filtering unit is connected with transformer T2 secondary, and
Including diode D6, D9, polarized electric capacity C10, C11 and inductance L4, wherein：The secondary phase of diode D6 positive poles and transformer T2
Even, negative pole is connected with inductance L4, and the polarized electric capacity C11 anodes connection inductance L4 other end simultaneously provides 24V power supplys, and negative terminal connects
Ground, is connected with diode D9 negative pole and polarized electric capacity C10 anodes in the circuit between diode D6 and inductance L4, and two
Pole pipe D9 positive pole and polarized electric capacity C10 negativing ending groundings.
6. DC-DC power source as claimed in claim 5, it is characterized in that：Driver transformer includes first, second connection end QA, QB,
First, second connection end QA, QB connects the output end of first, second driving bridge module respectively；First driving bridge module includes core
Piece one, the second driving bridge module include chip three, and chip one and chip three use the cake cores of ICL 7667, and first, second drives
Dynamic bridge module includes the 1st to 8 pin respectively, wherein：The pin of chip 1 the 2nd connects with the pin of chip 1 the 4th, the pin of chip 1 the 3rd ground connection, together
When chip 1 the 5th, 7 pin merge to form output end QA, the pin of chip 1 the 6th connection 15V is that chip one is powered, and polarized electric capacity C2 is just
The 6th pin V+ of end connection, negativing ending grounding；The pin of chip 3 the 2nd connects with the pin of chip 3 the 4th, the pin of chip 3 the 3rd ground connection, while chip
3 the 5th, 7 pin merge to form output end QB, and the pin of chip 3 the 6th connection 15V is that chip three is powered, and polarized electric capacity C17 anodes connect
Connect the 6th pin V+, negativing ending grounding.
7. DC-DC power source as claimed in claim 6, it is characterized in that：Resistance R2 of the signal circuit including chip two and periphery,
R5, R7, R11, R12, R13, electric capacity C3, C4, C15, C16 and C18, wherein：The frequency of chip two uses 28kHz, and it includes the 1st
To the 16th pin, wherein：Resistance R2 one end connect voltage output end and with resistance R5 formed bleeder circuit, the bleeder circuit with core
The pin of piece 2 the 1st is connected when connecting by electric capacity C16 with the 9th pin；Resistance R11 one end is connected with the pin of chip 2 the 6th, another termination
Ground；Electric capacity C15 one end connects the pin of chip 2 the 5th and resistance R12 one end respectively, and the electric capacity C15 other ends are grounded, and resistance R12 is another
The end connection pin of chip 2 the 7th；Electric capacity C4 one end is connected with the pin of chip 2 the 2nd and the 16th pin respectively, electric capacity C4 other ends ground connection；Electricity
Hold C18 one end to be connected with the pin of chip 2 the 8th, the electric capacity C18 other ends are with connecting ground；Resistance R7 one end supplies with the 15th pin and 15V respectively
Electrical connection, the resistance R7 other ends are connected with the 13rd pin；Resistance R13 one end is connected with the 10th pin, the resistance R13 other ends and ground connection；
11st pin, the 14th pin are respectively two signal output ports A, B of chip two；12nd pin and ground connection.
8. DC-DC power source as claimed in claim 7, it is characterized in that：15V power supply circuits are started by additional startup power supply, so
The DC low-voltage converted afterwards using power supply itself, realizes 15V power supply circuits, DC circuit includes relay by three terminal regulator
Device, polarized electric capacity C1 and three terminal regulator, wherein：External startup power supply is connected to startup power supply through relay switch pin
Between three terminal regulator input, three terminal regulator earth terminal is grounded and connects relay grounding leg, polarized electric capacity C1's
Anode is connected between relay switch pin and three terminal regulator input and negativing ending grounding, exports three terminal regulator output end
15V stabilized power sources, three terminal regulator output end connect the 15th pin of chip two, and relay is 24V relays.
9. DC-DC power source as claimed in claim 8, it is characterized in that：Output short circuit protection circuit include triode QT1, QT2 and
Resistance R66, R68, R69, wherein when output current is normal, pass through resistance R67, R68 partial pressure so that triode QT1 transmitting
Electrode potential is higher than base potential, and emitter stage is reverse-biased, and then triode QT1 is in by state, triode QT2 is on shape
State；When output end occurs short-circuit, output voltage is close to zero, and regards triode QT1 grounded emitters as, now triode QT1
Conducting, makes triode QT2 base voltages be opened a way close to zero triode QT2.
10. DC-DC power source as claimed in claim 9, it is characterized in that：Output circuit has 24V connection ends, relay and inductance
L4 has 24V ends pin respectively, wherein：24V connection ends also connect inductance L424V ends pin when connecting relay 24V end pin.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710729837.3A CN107370388B (en) | 2017-08-23 | 2017-08-23 | DC-DC power supply for converting high voltage into low voltage |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710729837.3A CN107370388B (en) | 2017-08-23 | 2017-08-23 | DC-DC power supply for converting high voltage into low voltage |
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| CN107370388B CN107370388B (en) | 2024-07-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112238788A (en) * | 2019-07-16 | 2021-01-19 | 宁德时代新能源科技股份有限公司 | Power supply guarantee system and power supply guarantee method |
| CN113676027A (en) * | 2021-08-09 | 2021-11-19 | 武汉佰力博科技有限公司 | High-voltage driving circuit for piezoelectric ceramic material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6181576B1 (en) * | 1999-04-09 | 2001-01-30 | Sansha Electric Manufacturing Company Limited | Power supply apparatus for arc-utilizing apparatuses |
| CN101719727A (en) * | 2009-12-14 | 2010-06-02 | 北京理工大学 | dc-dc converter |
| CN106026666A (en) * | 2016-06-23 | 2016-10-12 | 广东工业大学 | DC-DC converter |
-
2017
- 2017-08-23 CN CN201710729837.3A patent/CN107370388B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6181576B1 (en) * | 1999-04-09 | 2001-01-30 | Sansha Electric Manufacturing Company Limited | Power supply apparatus for arc-utilizing apparatuses |
| CN101719727A (en) * | 2009-12-14 | 2010-06-02 | 北京理工大学 | dc-dc converter |
| CN106026666A (en) * | 2016-06-23 | 2016-10-12 | 广东工业大学 | DC-DC converter |
Non-Patent Citations (2)
| Title |
|---|
| 季重阳等: "高压输入串联电流型电火花电源的设计", 《自动化与仪器仪表》 * |
| 石健将等: "一种具有输入端电容均压的串-并型双管正激组合变换器研究", 《中国电机工程学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112238788A (en) * | 2019-07-16 | 2021-01-19 | 宁德时代新能源科技股份有限公司 | Power supply guarantee system and power supply guarantee method |
| CN113676027A (en) * | 2021-08-09 | 2021-11-19 | 武汉佰力博科技有限公司 | High-voltage driving circuit for piezoelectric ceramic material |
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| Publication number | Publication date |
|---|---|
| CN107370388B (en) | 2024-07-16 |
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