CN208316590U - A kind of novel LWD host PFC correction regulated power supply system - Google Patents
A kind of novel LWD host PFC correction regulated power supply system Download PDFInfo
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- CN208316590U CN208316590U CN201820691311.0U CN201820691311U CN208316590U CN 208316590 U CN208316590 U CN 208316590U CN 201820691311 U CN201820691311 U CN 201820691311U CN 208316590 U CN208316590 U CN 208316590U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model discloses a kind of novel LWD host PFC to correct regulated power supply system, including level-one AC-DC power circuit and second level DC-DC voltage regulator circuit, alternating current passes through the level-one AC-DC power circuit and second level DC-DC voltage regulator circuit, electric power is provided for LWD host, level-one AC-DC power circuit further includes, anti-interference filtration circuit, rectification and Boost pfc circuit, PFC control and protection circuit and auxiliary power circuit, alternating current passes through anti-interference filtration circuit and rectification and Boost pfc circuit, it powers respectively to second level DC-DC voltage regulator circuit and auxiliary power circuit, auxiliary power circuit controls and protects circuit power supply to PFC；Beneficial effect is to realize that output ripple is low, and the electrical isolation of input terminal and output end, power good is reliable, and power supply is small in size, and light-weight, power-efficient is high, save the cost.
Description
Technical field
The utility model relates to oil field directional wells, horizontal well geosteering technical field of measuring equipment；More particularly to leading
The host regulated power supply system used to tool LWD.
Background technique
LWD host regulated power supply mainly uses switch power supply topological structure.But the energy of Switching Power Supply derives from power grid,
And it is directly connect with rectifier bridge.Rectifier bridge usually contains the non-linear elements such as diode and capacitor forms capacitor filtering type bridge-type knot
Structure, it is sine wave that this, which has resulted in input voltage waveform, and the waveform of input current is interrupted pulse type, and harmonic content is high, directly
Connect pollution power grid.In LWD host regulated power supply, in order to solve influence of the harmonic wave to circuit, pfc circuit, i.e. function are generallyd use
Rate factor correcting circuit.
The method that general LWD host supplying power power supply generally uses inductance compensation at present, so that the fundamental current of exchange input
The mode of phase difference reduction carrys out increase power factor between voltage, and the power factor of such mode can only achieve 0.7-0.8, it
It is typically mounted near high-voltage filtering capacitor.This method structure bulky, job insecurity have low-frequency vibration noise often；
And this kind of pfc circuit, heat dissipation effect is poor, is unfavorable for Switching Power Supply long-term work.
There is an urgent need to a kind of LWD host PFC to correct regulated power supply system, small in size, light-weight, input terminal and output in market
The electrical isolation at end, power supply ripple rate is low, and power-efficient is high；With certain promotional value.
Summary of the invention
Technical problem to be solved by the utility model is to provide a kind of LWD host PFC to correct regulated power supply system.
The utility model is the technical scheme adopted is that the utility model LWD host PFC corrects regulated power supply system, packet
Level-one AC-DC power circuit and second level DC-DC voltage regulator circuit are included, alternating current passes through the level-one AC-DC power circuit and second level DC-
DC voltage regulator circuit provides electric power for LWD host.
Level-one AC-DC power circuit further includes, anti-interference filtration circuit, rectification and Boost pfc circuit, PFC control and
Circuit and auxiliary power circuit are protected, alternating current is by the anti-interference filtration circuit and rectification and Boost pfc circuit, respectively
It powers to second level DC-DC voltage regulator circuit and auxiliary power circuit, auxiliary power circuit controls and protect circuit power supply to PFC, whole
Stream and Boost pfc circuit control with PFC and circuit are protected to be electrically connected.
Second level DC-DC voltage regulator circuit further includes DC-DC converter, auxiliary power circuit, DC-DC control and protection circuit
Part and output filter circuit, auxiliary power circuit control with DC-DC and circuit are protected to be electrically connected, DC-DC control and protection electricity
Road is electrically connected with DC-DC converter all the way, and another way provides electric power by output filter circuit for LWD host.
Anti-interference filtration circuit includes that leading portion protects circuit and inputs the level-one EMI filter circuit of terminal protecting circuit composition
With second level EMI filter circuit, alternating current passes through level-one EMI filter circuit and second level EMI filter circuit and rectification and Boost PFC electricity
Road electrical connection；The PFC control circuit is made of integrated circuit L6562A and its peripheral circuit.
Second level DC-DC converter circuit is made of power management chip circuit LM2576 and its peripheral circuit；Output filter
Wave circuit is made of π type filter circuit.
The utility model has the beneficial effects that by using active PFC switch power supply topological structure, it is real in conjunction with pi-network
Existing output ripple is low, and power good is reliable, the electrical isolation of input terminal and output end, using PFC correcting circuit so that power because
Number is close to 1, and power-efficient is high, and power supply is small in size, light-weight, save the cost.
Detailed description of the invention
Fig. 1 is the structural block diagram of the utility model；
Fig. 2 is the utility model LWD host PFC correction regulated power supply system integrated circuit figure；
Fig. 3 is the utility model level-one, second level EMI filter circuit；
Fig. 4 is the utility model high frequency transformer circuit；
Fig. 5 is the utility model PFC correcting circuit；
Fig. 6 is the voltage waveform and current waveform figure after the utility model shaping；
Fig. 7 is the DC-DC circuit figure of the utility model LWD host PFC correction regulated power supply system；
Fig. 8 is the utility model π type filter circuit；
Fig. 9 is integrated circuit L6562A schematic diagram used in the utility model.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and detailed description:
Fig. 1 is the structural block diagram of the utility model；Fig. 2 is that the utility model LWD host PFC correction regulated power supply system is whole
Body circuit diagram, as shown in Figure 1 and Figure 2, the utility model LWD host PFC correct regulated power supply system, including level-one AC-DC power supply
Circuit and second level DC-DC voltage regulator circuit, alternating current are by the level-one AC-DC power circuit and second level DC-DC voltage regulator circuit
LWD host provides electric power.
Level-one AC-DC power circuit further includes, anti-interference filtration circuit, rectification and Boost pfc circuit, PFC control and
Circuit and auxiliary power circuit are protected, alternating current is by the anti-interference filtration circuit and rectification and Boost pfc circuit, respectively
It powers to second level DC-DC voltage regulator circuit and auxiliary power circuit, auxiliary power circuit controls and protect circuit power supply to PFC, whole
Stream and Boost pfc circuit control with PFC and circuit are protected to be electrically connected.
Second level DC-DC voltage regulator circuit further includes DC-DC converter, auxiliary power circuit, DC-DC control and protection circuit
Part and output filter circuit, auxiliary power circuit control with DC-DC and circuit are protected to be electrically connected, DC-DC control and protection electricity
Road is electrically connected with DC-DC converter all the way, and another way provides electric power by output filter circuit for LWD host.
Anti-interference filtration circuit includes that leading portion protects circuit and inputs the level-one EMI filter circuit of terminal protecting circuit composition
With second level EMI filter circuit, alternating current passes through level-one EMI filter circuit and second level EMI filter circuit and rectification and Boost PFC electricity
Road electrical connection；The PFC control circuit is made of power supply chip L6562A and its peripheral circuit.
Second level DC-DC converter circuit is made of power management chip circuit LM2576 and its peripheral circuit；Output filter
Wave circuit is made of π type filter circuit.
Fig. 3 is the utility model level-one, second level EMI filter circuit；As shown in figure 3, shown mainly includes common mode inductance
L1, L2, capacitor C1, C2(X capacitor), protective tube F1, the output end of input terminal and rectifier bridge connects；The power supply is set to meet electricity
Magnetic compatibility feature inhibits the influence and power supply of common mode, difference mode signal to power grid to the electromagnetic interference of other electronic equipments, makes
It meets IEC standard.
Fig. 4 is the utility model high frequency transformer circuit, and Fig. 5 is the utility model PFC correcting circuit, and Fig. 6 is that this is practical
Voltage waveform and current waveform figure after novel shaping；As shown in Figures 4 to 6, the utility model circuit topology is based on the school PFC
Just, Buck topological structure, is able to carry out PFC, with over-voltage is self-locking and the regulated power supply system of under-voltage protection.
PFC correcting circuit brief introduction of work principle: carrying out proportional sampling to output voltage waveforms by resistance R6, R7 and R8,
Feed back the port 1 of integrated circuit L6562A, that is, the negative input end of error amplifier, the output port 2 of error amplifier and logical
The input voltage waveform that resistance R2, R3 proportional sampling obtains is crossed, multiplying is done, as the reference voltage waveform of PWM waveform, with
The Mos tube voltage value obtained by resistance R11, R12 is made comparisons, and the PWM square wave of output controls the switch of Mos pipe, is believed with ZCD
Number collective effect guarantees that the envelope that the current waveform of output is kept is sinusoidal half cycles shape.Capacitor C6 and C7, resistance R9 structure
At frequency compensation network, so that the frequency response of integrated circuit L6562A error amplifier within 100Hz, guarantees input terminal electricity
Corrugating is sinusoidal half cycles.The port 5 of integrated circuit L2526A is ZCD signal, and high frequency transformer auxiliary winding samples to obtain
Voltage value connect with the port integrated circuit L2526A 5, when output voltage values drop to 0, ZCD signal control generate arteries and veins
Punching, is sent on the rest-set flip-flop of L2526A.
The utility model increases high frequency transformer circuit in traditional topology.When just connecing alternating current, pass through resistance R1, R4
Integrated circuit L6562A is powered；After normal work, there is high frequency transformer auxiliary winding, by capacitor C2, diode D5,
Diode D7, resistance R5 power to L6562A, and D7 is zener diode, and D5 is fast recovery diode, and resistance R5 is current-limiting resistance.
The PFC correcting circuit, is made of power IC L6562A and its peripheral circuit, this integrated circuit carry over-voltage and
The stability of voltage-stabilized power supply circuit has been effectively ensured in under-voltage protection function, and the voltage current waveform after correction is as shown in fig. 6, electricity
Corrugating and current waveform same-phase.
Fig. 7 is the DC-DC circuit figure of the utility model LWD host PFC correction regulated power supply system；As shown in fig. 7, using
Buck circuit topology, output end are filtered using π type, reduce ripple rate.
Fig. 8 is the utility model π type filter circuit；As shown in figure 8, LC(L4, C9 are added behind output filter capacitor,
C10) filter circuit forms pi-network, for adjusting output voltage waveforms.
Fig. 9 is integrated circuit L6562A schematic diagram used in the utility model, as shown in figure 9, integrated circuit L656A have it is following
Several important features:
Under-voltage sluggishness is locked；Minimum starting current (representative value 50uA, 90uA can guarantee normal starting), simply
Start-up circuit (only needing a resistance), low-down power consumption；Internal reference signal precision is 1%(in Tj=25 °C)；Have
Ena-bung function can turn off chip, reduce circuit power consumption；Two-stage overvoltage protection；Built-in starter and zero current detecting circuit are used
To run critical conduction mode；Built-in multiplier dynamic continues to adapt to wide input voltage application；RC built in current detecting foot is filtered；
The output of high-performance totem, can directly drive MOSFET or IGBT.
L6561A is optimized, can be used as the PFC based on boost topology circuit, such as electronics town
Flow device, AC-DC adapter, low power switch power supply (< 150W) etc..However, excellent performance and considerably less periphery due to it
Element can also equally use in other topological structures.In low-power off-line type AC-DC converter.
The utility model is by using active PFC switch power supply topological structure, in conjunction with pi-network, realizes that output ripple is low,
Power good is reliable, the electrical isolation of input terminal and output end, using PFC correcting circuit, so that power factor is close to 1, power supply
It is high-efficient, and power supply is small in size, light-weight, save the cost.
It is worth noting that the protection scope of the utility model is not limited to above-mentioned specific example mode, according to this reality
Conceived with novel basic fundamental, it is also possible to which the purpose of this utility model may be implemented in basically same structure, as long as this field
Those of ordinary skill needs not move through creative work, the embodiment that can be associated, and belongs to the protection model of the utility model
It encloses.
Claims (4)
1. a kind of novel LWD host PFC corrects regulated power supply system, which is characterized in that including level-one AC-DC power circuit and two
Grade DC-DC voltage regulator circuit, alternating current are mentioned by the level-one AC-DC power circuit and second level DC-DC voltage regulator circuit for LWD host
For electric power；The level-one AC-DC power circuit further includes anti-interference filtration circuit, rectification and Boost pfc circuit, PFC control
System and protection circuit and auxiliary power circuit, alternating current by the anti-interference filtration circuit and rectification and Boost pfc circuit,
It powers respectively to second level DC-DC voltage regulator circuit and auxiliary power circuit, auxiliary power circuit controls to PFC and circuit is protected to supply
Electricity, rectification and Boost pfc circuit control with PFC and circuit are protected to be electrically connected.
2. novel LWD host PFC according to claim 1 corrects regulated power supply system, which is characterized in that the second level
DC-DC voltage regulator circuit further includes DC-DC converter, auxiliary power circuit, DC-DC control and protection circuit part and output filter
Wave circuit, auxiliary power circuit and DC-DC are controlled and circuit are protected be electrically connected, DC-DC control and protect circuit all the way with DC-DC
Converter electrical connection, another way provide electric power by output filter circuit for LWD host.
3. novel LWD host PFC according to claim 1 corrects regulated power supply system, which is characterized in that described is anti-dry
Disturbing filter circuit includes, and leading portion protects circuit and inputs the level-one EMI filter circuit and second level EMI filtering of terminal protecting circuit composition
Circuit, alternating current are electrically connected by level-one EMI filter circuit and second level EMI filter circuit with rectification and Boost pfc circuit；It is described
PFC control circuit be made of power supply chip L6562A and its peripheral circuit.
4. novel LWD host PFC according to claim 2 corrects regulated power supply system, which is characterized in that the DC-DC
Converter is made of power management chip circuit LM2576 and its peripheral circuit；Output filter circuit is by π type filter circuit
Composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820691311.0U CN208316590U (en) | 2018-05-10 | 2018-05-10 | A kind of novel LWD host PFC correction regulated power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820691311.0U CN208316590U (en) | 2018-05-10 | 2018-05-10 | A kind of novel LWD host PFC correction regulated power supply system |
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| Publication Number | Publication Date |
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| CN208316590U true CN208316590U (en) | 2019-01-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820691311.0U Expired - Fee Related CN208316590U (en) | 2018-05-10 | 2018-05-10 | A kind of novel LWD host PFC correction regulated power supply system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113036721A (en) * | 2021-03-04 | 2021-06-25 | 杰华特微电子（杭州）有限公司 | Overvoltage protection method and protection circuit of booster circuit and booster circuit |
-
2018
- 2018-05-10 CN CN201820691311.0U patent/CN208316590U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113036721A (en) * | 2021-03-04 | 2021-06-25 | 杰华特微电子（杭州）有限公司 | Overvoltage protection method and protection circuit of booster circuit and booster circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201111 Address after: 300457 Tianjin Binhai New Area Development Zone No. second, No. 83, China Petroleum Tianjin building Bohai Drilling Engineering Co., Ltd. Patentee after: CNPC Bohai Drilling Engineering Co.,Ltd. Patentee after: CHINA NATIONAL PETROLEUM Corp. Address before: 300457 Tianjin Binhai New Area Development Zone No. second, No. 83, China Petroleum Tianjin building Bohai Drilling Engineering Co., Ltd. Patentee before: CNPC Bohai Drilling Engineering Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190101 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |