CN202565158U - Explosion suppression and intrinsic safety switch power with power factor correction - Google Patents
Explosion suppression and intrinsic safety switch power with power factor correction Download PDFInfo
- Publication number
- CN202565158U CN202565158U CN2012202087877U CN201220208787U CN202565158U CN 202565158 U CN202565158 U CN 202565158U CN 2012202087877 U CN2012202087877 U CN 2012202087877U CN 201220208787 U CN201220208787 U CN 201220208787U CN 202565158 U CN202565158 U CN 202565158U
- Authority
- CN
- China
- Prior art keywords
- module
- power
- intrinsic safety
- factor correction
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000004880 explosion Methods 0.000 title abstract description 9
- 230000001629 suppression Effects 0.000 title abstract 8
- 230000004224 protection Effects 0.000 claims abstract description 21
- 238000006243 chemical reaction Methods 0.000 claims abstract description 19
- 230000009977 dual effect Effects 0.000 claims description 14
- 238000005065 mining Methods 0.000 claims description 6
- 239000003245 coal Substances 0.000 abstract description 4
- 230000010355 oscillation Effects 0.000 abstract 2
- 238000001914 filtration Methods 0.000 description 6
- 239000003990 capacitor Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000005070 sampling Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
-
- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
Landscapes
- Rectifiers (AREA)
- Dc-Dc Converters (AREA)
Abstract
The utility model relates to a mine explosion suppression and intrinsic safety switch power and relates to an explosion suppression and intrinsic safety switch power with a factor correction link under a coal mine well, in particular to an explosion suppression and intrinsic safety switch power with power factor correction. The explosion suppression and intrinsic safety switch power resolves the problems that an existing mine explosion suppression and intrinsic safety switch power is low in electrified wire netting power factor, not prone to meet requirements of coal mine intrinsic safety circuits, and low in reliability. The explosion suppression and intrinsic safety switch power comprises a power box, an input module, a power conversion module, a control module, a frequency oscillation generating module, a double over-voltage and over-current protection output module and a power factor correction module. The input module is connected with the power conversion module through the power factor correction module, the power conversion module is respectively connected with the control module and the output module, the control module is connected with the frequency oscillation generating module, and the output module is connected with the double over-voltage and over-current protection output module. The explosion suppression and intrinsic safety switch power has the advantages of being capable of improving power factors, high in reliability, energy-saving, safe, power-saving and the like.
Description
Technical field
The utility model relates to the mine explosion-suppression and intrinsic safety power supply, relates in particular to the explosion-suppression and intrinsic safety Switching Power Supply of band power factor correction link under the coal mine, is specially a kind of explosion-suppression and intrinsic safety Switching Power Supply with power factor correction.
Background technology
The mine explosion-suppression and intrinsic safety type power supply is mainly used in down-holes such as colliery and contains in the environment of damp, for underground safety monitoring system, controller and various mining equipment provide intrinsically safe power supply.That the direct current linear stabilized power supply has is simple in structure, voltage ripple is little, response speed is fast, low cost and other advantages; Traditional mine explosion-suppression and intrinsic safety power supply has adopted the linear stabilized power supply technology just; But along with production practices are found; Adopt the linear stabilized power supply technology can cause that power-efficient is low, volume big, heating is high even can cause problem such as electric network pollution, and linear stabilized power supply can't adapt to the bigger occasion of mains fluctuations.After people recognize this problem gradually, begin to adopt Switching Power Supply to substitute the conventional linear stabilized voltage power supply.Adopt high frequency electronic switch principle design Switching Power Supply, brought efficient energy-saving, volume is little, loss is low and has adapted to advantages such as the electrical network ability is strong, so switching power supply has broad prospects in down-hole application such as colliery.
The downhole production that the Switching Power Supply that adopts at present directly applies to the colliery still has problems, for example:
(1) harmonic problem refers to behind the Switching Power Supply replacement linear power supply, and rectification circuit can make electrical network contain the non-sinusoidal current of serious distortion, produces high order harmonic component and makes the power factor of electrical network descend.
(2) elements such as the output of the Switching Power Supply electric capacity that directly configuration is big, inductance all can not meet the problem that the colliery intrinsically safe circuit requires; The input side of Flameproof and intrinsically safe power supply is the AC power of non-intrinsically safe safety; And outlet side is the essential safety power supply; In inside configuration is the change-over circuit of a non-intrinsically safe safety to essential safety, on electrical characteristic, should prevent outside non-intrinsically safe safety input and reach output, need reach the electric pressure that meets requirement of explosion proof; And electric pressure is more under the coal mine, and input side adopts Switching Power Supply should have the voltage range of broad.
(3) integrity problem; The down-hole Alternating Current Power Supply often has the loss of power accident to take place; Not not the losing of data message in the time of should guaranteeing to cut off the power supply, and consider the operational environment that the down-hole is concrete: situation such as device distribution dispersion, equipment unattended operation, therefore will improve the reliability of explosion-suppression and intrinsic safety Switching Power Supply.
In order to solve the problem that present mine explosion-suppression and intrinsic safety Switching Power Supply exists, the utility model provides a kind of explosion-suppression and intrinsic safety Switching Power Supply just with power factor correction.
Summary of the invention
The utility model for solve existing mine explosion-suppression and intrinsic safety Switching Power Supply exist power factor of electric network lower, be difficult for satisfying colliery intrinsically safe circuit requirement and the lower problem of reliability, a kind of explosion-suppression and intrinsic safety Switching Power Supply with power factor correction is provided.
The utility model is concrete to adopt following technical scheme to realize: a kind of explosion-suppression and intrinsic safety Switching Power Supply with power factor correction; Comprise power supply box, input module, Power Conversion module, control module, hunting of frequency generating module, dual over-voltage over-current protection output module; Also comprise the power factor correction module of forming by output voltage detecting circuit, feedback compensation and multiplier; Power supply box connects input module and connects the Power Conversion module through power factor correction module; The Power Conversion module is link control module and output module respectively, and control module connects the hunting of frequency generating module, connects dual over-voltage over-current protection output module on the output module.
The input power supply of said power supply box can provide respectively according to user's field condition and exchange among 660V, the 127V any one, secondaryly offers Switching Power Supply for the 127V winding.Input module is connected with power factor correction module and comprises that transformer, rectifier filter, its function are to accomplish the filtering of signal and put in order.Power factor correction module comprises output voltage detecting circuit, feedback compensation and multiplier; Realize reducing higher harmonic content, realize the suppressor pulse current harmonics, improve the function of power factor; Between input module and Power Conversion module, be applied to mining 127V electric pressure.Comprising electronic switch and high frequency transformer in the Power Conversion module, is dc voltage conversion square-wave pulse, and the high frequency square wave pulse voltage becomes 24V and the output of 27V two road direct voltages behind secondary rectification and DC filtering.Control module control is controlled external equipment with 24V voltage in order to drive relay coil; Control 27V voltage can offer backup battery charging and Charge Management; Can carry out dividing potential drop, sampling and reference voltage relatively; Be enlarged into control signal and remove pulse-width modulation and drive circuit; Can also directly tell 5 tunnel independence DC-DC, final through 5 road independent dual over-voltage over-current protections, needed 5 road 18V intrinsic safety electric sources output of generation system.The hunting of frequency generating module comprises sawtooth waveforms hunting of frequency generator, produces the hunting of frequency high-frequency signal, carries out pulse-width modulation with the control signal stack.Dual over-voltage over-current protection output module is realized the dual over-voltage over-current protection output of output voltage.
The utility model device also is equipped with reserve battery, so that reserve battery provides stabilized voltage power supply to realize uninterrupted power supply when outage.According to the underground work environment, device distribution is disperseed, many equipment unattended operations, so the design cuts off the electricity supply automatic recovery of supplying power after fault is eliminated automatically during fault according to the high reliability designing power supply.
Compared with prior art; A kind of explosion-suppression and intrinsic safety Switching Power Supply with power factor correction that the utility model provides has following beneficial effect, that is: little, the light weight of volume, reliability are high, have reduced higher harmonic content; Improved power factor; Realize reducing the loss saving electric energy of circuit, reduce the harmonic pollution of electrical network, improve the power supply quality of electrical network; And adopt switch power technology to have that output current, voltage are adjusted easily and stable, reliable, have the advantages such as voltage range of broad; The utility model can be contained in the mining production of explosive gas atmosphere by safe and reliable being used in.
Description of drawings
Fig. 1 is the said a kind of theory diagram with explosion-suppression and intrinsic safety Switching Power Supply of power factor correction of the utility model;
Fig. 2 is the said a kind of circuit theory diagrams with explosion-suppression and intrinsic safety Switching Power Supply of power factor correction of the utility model.
Embodiment
A kind of explosion-suppression and intrinsic safety Switching Power Supply with power factor correction; Comprise power supply box, input module, Power Conversion module, control module, hunting of frequency generating module, dual over-voltage over-current protection output module; Also comprise the power factor correction module of forming by output voltage detecting circuit, feedback compensation and multiplier; Power supply box connects input module and connects the Power Conversion module through power factor correction module; The Power Conversion module is link control module and output module respectively, and control module connects the hunting of frequency generating module, connects dual over-voltage over-current protection output module on the output module.
The input power supply of said power supply box can provide respectively according to user's field condition and exchange among 660V, the 127V any one, secondaryly offers Switching Power Supply for the 127V winding.Input module is connected with power factor correction module and comprises that transformer, rectifier filter, its function are to accomplish the filtering of signal and put in order.Power factor correction module comprises output voltage detecting circuit, feedback compensation and multiplier; Realize reducing higher harmonic content, realize the suppressor pulse current harmonics, improve the function of power factor; Between input module and Power Conversion module, be applied to mining 127V electric pressure.Comprising electronic switch and high frequency transformer in the Power Conversion module, is dc voltage conversion square-wave pulse, and the high frequency square wave pulse voltage becomes 24V and the output of 27V two road direct voltages behind secondary rectification and DC filtering.Control module control is controlled external equipment with 24V voltage in order to drive relay coil; Control 27V voltage can offer backup battery charging and Charge Management; Can carry out dividing potential drop, sampling and reference voltage relatively; Be enlarged into control signal and remove pulse-width modulation and drive circuit; Can also directly tell 5 tunnel independence DC-DC, final through 5 road independent dual over-voltage over-current protections, needed 5 road 18V intrinsic safety electric sources output of generation system.The hunting of frequency generating module comprises sawtooth waveforms hunting of frequency generator, produces the hunting of frequency high-frequency signal, carries out pulse-width modulation with the control signal stack.Dual over-voltage over-current protection output module is realized the dual over-voltage over-current protection output of output voltage.
The utility model device also is equipped with reserve battery; So that reserve battery provides stabilized voltage power supply to realize uninterrupted power supply when outage; When Alternating Current Power Supply just often; Reserve battery is in the floating charge state, and reserve battery is devoted oneself to work immediately when ac outage, keeps substation and transducer continuous operation more than 2 hours.When receiving the outside when providing control signal, the controlled device power supply is cut off or connects in the corresponding actuating of relay of may command.According to field condition, power supply box is placed on the equipment frame during use, introduces corresponding AC power, link to each other 16 core telecommunication cables with the mining substation in place, power supply box shell reliable ground.
The basic functional principle of the utility model is: input voltage via transformer step-down, rectifier bridge rectification, electrochemical capacitor filtering after; Obtain stable power output through the voltage stabilizing link again; For satisfying the security performance requirement, adopt dual over-current over-voltage protection simultaneously, make output satisfy the security performance requirement.Input voltage 660V or 127V, rated output voltage DC18V, output-current rating 300mA, the overvoltage protection output valve is smaller or equal to 19V, and the overcurrent protection output valve is smaller or equal to 350mA, and 4 groups of output relays, the capacity of relay contact are AC36V, 5A.
The concrete course of work is: the colliery exchanges 660V or 127V voltage converts interchange 127V voltage into after transformer transformation 17; Carry out LPF 1 through alternating current filter; Play the phase mutual interference of external circuit in isolating simultaneously; Carry out a rectification 2 through full-bridge circuit, get into power factor correction link 3 behind the dc pulse moving voltage of output, get into the Power Conversion link after the raising power factor; This link realizes (switch adjustment 4) by electronic switch and high frequency transformer, and function is for to convert direct voltage into controlled high frequency square wave pulse voltage.The high frequency square wave pulse voltage becomes direct voltage output behind secondary rectification 5 and DC filtering 6, the direct voltage of generation is divided into two-way, and wherein one the tunnel is direct current 24V, in order to drive relay coil control external equipment 7.Another road is 27V, and the main effect of this road voltage has three, and one for providing the charging voltage and the Charge Management 8 of battery; Two for telling 5 tunnel independence DC-DC, and through 5 road independent dual over-voltage over-current protections 15, needed 5 road 18V intrinsic safety electric sources output of generation system; Three for outputing to control circuit through dividing potential drop, sampling after 9, compares 10 with the benchmark 12 of circuit, is enlarged into control signal and removes to control pulse-width modulation and drive circuit 11, makes output voltage keep stablizing.The high frequency band signal 13 that sawtooth waveforms hunting of frequency generator produces carries out pulse-width modulation with the control signal stack.
As shown in Figure 2; Main circuit is a two-way output single-ended flyback; Integrated control chip KA5L0380R is adopted in switching device and PWM control; The KA5L0380R chip is made up of high pressure 800V power MOSFET switch tube and current control mode PWM integrated chip, the PWM controller the is integrated oscillator of fixed frequency, under-voltage locking, the optimization driving that turns on and off, hot turn-off protection, overvoltage protection, temperature-compensating and fault secure circuit etc.Integrated chip KA5L0380R compares with the PWM controller with isolated M OSFET, can reduce total number of devices, volume and weight, has increased efficient and system reliability simultaneously.
The D pin of Fig. 2 chips KA5L0380R is the drain electrode of MOSFET, and the G pin is the source electrode of MOSFET, also is the ground of this chip simultaneously, and VCC is the operating voltage of chip, is obtained through R12, R13 and capacitor C 9 by DC bus-bar voltage, and this voltage is 30V to the maximum.The FB pin connects feedback voltage, and photoelectrical coupler LTV817, adjustable precision voltage-reference TL431 and C13 form a negative feedback closed loop system.Through the output voltage sampling circuit of resistance R 7 with the R8 formation; The voltage reference of the inner 2.5V of voltage signal and TL431 is compared and the error voltage that forms changes the electric current that LED flows through in the photoelectrical coupler; Promptly control light and accept the aperture of triode; Thereby make KA5L0380R send pwm control signal, regulate the output duty cycle scope of KA5L0380R and use output voltage to remain unchanged, finally reach the effect of voltage stabilizing.
The boost chopper that circuit of power factor correction mainly is made up of integrated power factor correcting chip SA7527, switch mosfet pipe FQPT4N90, winding of inductance TX2, capacitor C 15.
But it is a simple circuit of power factor correction efficiently that power factor corrector adopts integrated chip SA7527; Except function with general pwm chip; Accurate overvoltage protection, adjustment zero current detector, multiplier, built-in startup timer, R/C filter, correctable 1.5% inner band-gap reference, under voltage locking, output driver clamp circuit also are provided, and starting current and operating current are low.Also has special anti-puncture circuit in addition.This circuit is volume required little, and is low in energy consumption, the high density power supply that peripheral components is few.
The INV pin of integrated power factor correcting device SA7527 is the paraphase input of error amplifier, and R9, R11, R12, RV2 constitute output voltage detecting circuit, detects voltage and is input to pin INV.Pin EA is EA_OUT, is the output pin of error amplifier, and this pin becomes a feedback compensation network through connecting between capacitor C 7 and the INV pin.MULT is the multiplier input pin, and resistance R 1, R2 and R3 constitute the input MULT pin that rectification output sampled signal inserts the SA7527 product calculation.CS is the input pin of PWM comparator.The MOSFET tube current changes voltage into and offers the CS pin through after the resistance R 9.Idet is the zero current detection input pin.GND is a ground pin.OUT is a threshold drive device output pin, and the peak current 500mA of this push-pull output stage can driving power MOSFET pipe.The OUT end is received the grid of MOSFET in the circuit through resistance R 8.Pin VCC is the operating voltage input pin of chip, obtains through R4, R5 and capacitor C 6 through DC bus-bar voltage.
During work; Boost chopper output voltage detected value is regulated output through pin INV and internal reference voltage through error amplifier; Output signal and the rectifier output voltage signal (absolute value of sinusoidal voltage; Pulsation is twice in the one-period) multiply each other through pin MULT entering multiplier, multiplied result is as current reference value.And the loop actual current inserts pin CS by resistance R 10, and relatively carries out Current Control with reference value, the pwm signal that output duty cycle changes by sinusoidal rule, and with the input voltage homophase.This signal is received the grid of MOSFET through resistance R 8 by the OUT pin; Control MOSFET turns on and off by sinusoidal rule, thereby control flows is crossed the absolute value of the current waveform of inductance for sine wave, thereby makes the waveform of input current be sine wave; And the input voltage homophase, input power factor is near 1.
Although illustrated and described the preferred embodiment of the utility model, it is contemplated that those skilled in the art can design carry out various modifications to the utility model in the spirit of the utility model and scope.
Claims (3)
1. explosion-suppression and intrinsic safety Switching Power Supply with power factor correction; Comprise power supply box, input module, Power Conversion module, control module, hunting of frequency generating module, dual over-voltage over-current protection output module; It is characterized in that: also comprise the power factor correction module of forming by output voltage detecting circuit, feedback compensation and multiplier; Power supply box connects input module and connects the Power Conversion module through power factor correction module; The Power Conversion module is link control module and output module respectively, and control module connects the hunting of frequency generating module, connects dual over-voltage over-current protection output module on the output module.
2. a kind of explosion-suppression and intrinsic safety Switching Power Supply with power factor correction as claimed in claim 1 is characterized in that described power factor correction module is applied to mining 127V electric pressure.
3. like claim 1 and 2 described a kind of explosion-suppression and intrinsic safety Switching Power Supplies, it is characterized in that power factor correction module use integrated power factor correcting device SA7527 with power factor correction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202087877U CN202565158U (en) | 2012-05-10 | 2012-05-10 | Explosion suppression and intrinsic safety switch power with power factor correction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202087877U CN202565158U (en) | 2012-05-10 | 2012-05-10 | Explosion suppression and intrinsic safety switch power with power factor correction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202565158U true CN202565158U (en) | 2012-11-28 |
Family
ID=47214768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012202087877U Expired - Lifetime CN202565158U (en) | 2012-05-10 | 2012-05-10 | Explosion suppression and intrinsic safety switch power with power factor correction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202565158U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107565815A (en) * | 2017-10-19 | 2018-01-09 | 海南师范大学 | Switching Converter Topologies with preprocessing function |
| CN109104086A (en) * | 2018-11-05 | 2018-12-28 | 亚瑞源科技（深圳）有限公司 | A kind of DC-DC converter with power factor correction function |
| CN114244140A (en) * | 2022-01-28 | 2022-03-25 | 四川航天电液控制有限公司 | Mining explosion-proof and intrinsically safe direct-current power supply |
| CN115498881A (en) * | 2022-09-13 | 2022-12-20 | 中国矿业大学 | Electric energy/signal synchronous transmission system and method for intrinsic safety power supply |
-
2012
- 2012-05-10 CN CN2012202087877U patent/CN202565158U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107565815A (en) * | 2017-10-19 | 2018-01-09 | 海南师范大学 | Switching Converter Topologies with preprocessing function |
| CN109104086A (en) * | 2018-11-05 | 2018-12-28 | 亚瑞源科技（深圳）有限公司 | A kind of DC-DC converter with power factor correction function |
| CN109104086B (en) * | 2018-11-05 | 2023-10-20 | 亚瑞源科技（深圳）有限公司 | DC-DC converter with power factor correction function |
| CN114244140A (en) * | 2022-01-28 | 2022-03-25 | 四川航天电液控制有限公司 | Mining explosion-proof and intrinsically safe direct-current power supply |
| CN115498881A (en) * | 2022-09-13 | 2022-12-20 | 中国矿业大学 | Electric energy/signal synchronous transmission system and method for intrinsic safety power supply |
| CN115498881B (en) * | 2022-09-13 | 2025-04-08 | 中国矿业大学 | Electric energy/signal synchronous transmission system and method for intrinsic safety power supply |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104124748B (en) | Bus station's intelligent power supply power-supply system that a kind of clean energy resource compensates | |
| CN105914868B (en) | Supercapacitor energy storage uninterruptible power supply based on current transformer and its power supply method | |
| CN103023128B (en) | A kind of power-supply system for UPS server | |
| CN103248108B (en) | Switch and the LED driver of reusable DC-DC module with metal-oxide-semiconductor | |
| CN203119598U (en) | Double-channel direct-current (DC) output waterproof constant current power source | |
| CN103187792B (en) | The uninterrupted high frequency switch power of high energy efficiency in ATM | |
| CN107394864A (en) | A kind of accumulator of electric car charging and discharging state monitoring system | |
| CN203747501U (en) | Mine Intrinsically Safe DC Uninterruptible Power Supply | |
| CN110912415A (en) | Low-power-consumption isolated output household power supply | |
| CN202565158U (en) | Explosion suppression and intrinsic safety switch power with power factor correction | |
| CN103872747A (en) | Uninterrupted 12V direct-current power system | |
| CN103001313B (en) | Off-line uninterrupted power system | |
| CN101635523A (en) | External mining intrinsic safety power supply | |
| CN103036437B (en) | Distribution network terminal power supply device | |
| CN201839195U (en) | AC-DC dual-purpose high-voltage DC power supply system | |
| CN201887991U (en) | Module integrated, high-efficiency and high-power LED (light-emitting diode) driving power supply circuit | |
| CN104201761A (en) | Power supply system integrating photovoltaic power system and communication power supply | |
| CN103997199A (en) | Active power factor correction circuit with fault detection function | |
| CN201418038Y (en) | External intrinsic safety power supply for mining use | |
| CN204761314U (en) | Be applied to electric power supply unit that gets of cable worker well | |
| CN202918038U (en) | Intelligent voltage stabilization charger for backpack battery | |
| CN204244076U (en) | Ultra-wide input voltage DC-DC power source | |
| CN203691365U (en) | Self-powered circuit of power semiconductor switch driving circuit | |
| CN203180773U (en) | Passive intelligent power distribution apparatus | |
| CN201742112U (en) | Wind and solar energy supplementary power tracking controller based on feedback compensation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121128 |