CN101867298A - Intrinsically-safe power supply device for mining - Google Patents
Intrinsically-safe power supply device for mining Download PDFInfo
- Publication number
- CN101867298A CN101867298A CN 201010220652 CN201010220652A CN101867298A CN 101867298 A CN101867298 A CN 101867298A CN 201010220652 CN201010220652 CN 201010220652 CN 201010220652 A CN201010220652 A CN 201010220652A CN 101867298 A CN101867298 A CN 101867298A
- Authority
- CN
- China
- Prior art keywords
- output
- circuit
- voltage
- power supply
- input
- 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.)
- Pending
Links
Images
Abstract
The invention relates to an intrinsically-safe power supply device for mining, which is characterized in that the input end of an input filter and rectifier circuit is connected with a mine low-voltage AC power grid, the output DC voltage of the input filter and rectifier circuit is connected with the input end of a high-frequency inverter circuit, the output end of the high-frequency inverter circuit is connected with the input end of an output rectifier and filter circuit, a control pulse generation circuit generates PWM pulses required for controlling the inversion of the high-frequency inverter circuit through output voltage and current feedback, the input end of a controller internal power supply circuit is connected with the DC voltage output by the input filter and rectifier circuit, the output end of the controller internal power supply circuit supplies power to a controller in the control pulse generation circuit, and an intrinsically-safe protection circuit realizes intrinsically-safe protection through acquiring the output voltage and the load current of the output rectifier and filter circuit. The invention solves the problems that the volume of the existing coal mine underground DC constant-voltage power supply is large, the power supply efficiency is low, the power grid adaptability is poor, the intrinsically-safe output power is small, and the like, provides safe and reliable guarantee for the coal mine underground power supply and creates good conditions for coal mine underground automatic mining.
Description
Technical field
The present invention relates to a kind of mining supply unit, particularly a kind of big capacity intrinsically-safe power supply device that uses at explosive hazard environments such as gas, coal dusts that is applicable to.
Technical background
Intrinsically-safe power supply device in power supply signal, instrument, communication, monitoring and the automated system thereof of existing coal mining does not satisfy the demand of mine development end automation, and pressing for and solving mining jumbo intrinsically-safe power supply device is the outstanding major issue of existing colliery automated mining.
The intrinsic safety D.C. regulated power supply is made up of two big modules, AC/DC DC voltage-stabilizing module and intrinsic safety output protection module.The AC/DC DC voltage-stabilizing module of mine intrinsic safety D.C. regulated power supply adopts linear stabilized power supply to realize more at present, and linear stabilized power supply has shortcomings such as power supplying efficiency is low, anti-interference is poor, volume is big, when power system in mines voltage fluctuates widely, usually can not stable operation, grid adaptability is poor; The intrinsic safety output module is owing to be subjected to mine coal-cutting working face coal dust big, condition restriction such as gas density height, its power output is lower always, be difficult to satisfy many high power devices such as support electrohydraulic control system electromagnetically operated valve in the down-hole coal excavation working face automation control system, gas concentration sensor etc. are to the demand of big capacity intrinsic safety electric source.For this reason, the present invention improves existing intrinsically-safe power supply device on the basis of existing intrinsically-safe power supply device, to satisfy and can guarantee the demand of colliery automated mining and the fail safe and the reliability of coal mining.
Summary of the invention
The invention provides a kind of intrinsically-safe power supply device for mining, problem such as it is bigger to be used to solve the volume ratio that D.C. regulated power supply exists under the existing coal mine, and power supplying efficiency is low, and grid adaptability is poor, and the intrinsic safety power output is little.
The present invention is based on the problems referred to above and purpose, the technical scheme of being taked comprises the input filter rectifier, high-frequency inverter circuit, output rectifier and filter, control impuls generative circuit, controller interior power supply circuit and safety protection circuit.Wherein, the input termination mine low-voltage alternating-current electrical network of input filter rectifier; the input of its output DC crimping high-frequency inverter circuit; with the direct voltage inversion is the high-frequency PWM pulse; the high-frequency PWM pulse of high-frequency inverter circuit output connects the input of output rectifier and filter; the high-frequency PWM impulse commutation is filtered into the direct voltage of grade of rated voltage; the control impuls generative circuit passes through output voltage; current feedback generates the required pwm pulse of control high-frequency inverter circuit inversion; the direct voltage of the input termination input filter rectifier output of controller interior power supply circuit; export to the power supply of control impuls generative circuit middle controller, the safety protection circuit is realized safety protection by gathering output rectifier and filter output voltage and load current.
Described input filter rectifier is by the input protection unit, input filter unit and rectifier bridge unit three parts constitute, the input termination mine low-voltage alternating-current electrical network of input protection unit wherein, output termination input filter unit, input filter unit output termination rectifier bridge unit input, rectification bridge output end connects the input of high-frequency inverter circuit;
Described high-frequency inverter circuit is by driving transformer, MOSFET and MOSFET protective circuit constitute, the PWM drive signal of the former edge joint control impuls generative circuit output of driving transformer wherein, secondary is connected with source electrode through the grid of resistance and MOSFET, and the MOSFET protective circuit is connected in parallel between MOSFET drain electrode and the source electrode;
Described output rectifier and filter is by the commutating pulse transformer, rectifier diode, inductance and electric capacity constitute, the output of the former edge joint high-frequency inverter circuit of commutating pulse transformer wherein, its secondary connects rectifier diode, inductance is connected on rectifies output DC loop, and electric capacity is connected in parallel in the rectifies output DC loop;
Described control impuls generative circuit is to be made of switching power source chip and electric current and voltage feedback circuit; Input termination load terminal voltage current feedback signal wherein, output is to be used to control the pwm pulse signal that high-frequency inverter circuit MOSFET turns on and off;
Described controller interior power supply circuit is to be made of isolated form DC/DC step-down module, filtering capacitance of voltage regulation and dummy resistor load, the input termination input filter rectifier output of isolated form DC/DC step-down module wherein, filtering capacitance of voltage regulation and dummy resistor load are connected in parallel on the output of isolated form DC/DC step-down module;
Described safety protection circuit is to be made of power-monitoring chip and switch mosfet pipe; power-monitoring chip input wherein connects voltage, the current signal of input filter rectifier output; the switch mosfet pipe is connected in the output rectifier and filter output voltage loop, and its state of turning on and off is the control level signal deciding by the output of power-monitoring chip.
Advantage that a kind of intrinsically-safe power supply device for mining had and good effect that the present invention calls oneself are: by the wide region pwm pulse duty ratio modulation and the two feedbacks of electric current and voltage of control impuls generative circuit, make device allow input voltage range to widen, can adapt to fluctuating widely of line voltage under the coal mine; High-frequency inverter circuit and output rectifier and filter adopt high-frequency inversion technology and high-frequency rectification technology, have saved bulky Industrial Frequency Transformer, and device volume is reduced, compact conformation, and power supplying efficiency obviously improves; The input filter rectifier can effectively suppress the various interference in the power system in mines at device input termination piezo-resistance, common mode inhibition inductance, common mode filtering electric capacity and differential mode filter capacitor, has improved the antijamming capability of device; The input filter rectifier has overheated, overvoltage of input and overcurrent protection function, and the control impuls generative circuit has device input under voltage, output under voltage and output excess current protective function.The safety protection circuit has output overcurrent, overpower protection and the defencive function that powers on, and above three-level protective has not only improved the fail safe and the reliability of whole device operation, and has effectively improved the intrinsic safety power supply capacity of whole device.
Description of drawings
Fig. 1 is that the present invention imports filter rectifier;
Fig. 2 is a high-frequency inverter circuit of the present invention;
Fig. 3 is an output rectifier and filter of the present invention;
Fig. 4 is a controller interior power supply circuit of the present invention;
Fig. 5 is a control impuls generative circuit of the present invention;
Fig. 6 is a safety protection circuit of the present invention;
Fig. 7 is output current collection of the present invention and output voltage filter circuit.
Embodiment
With embodiment a kind of mining big capacity intrinsically-safe power supply device of the present invention is described in further detail below in conjunction with accompanying drawing, the technical staff in described field is after having read this specific embodiment, technical solutions according to the invention can be realized, also advantage of the present invention and good effect can be embodied simultaneously.
The present invention is by importing filter rectifier, high-frequency inverter circuit, output rectifier and filter, control impuls generative circuit, controller interior power supply circuit, safety protection circuit, output current collection and output voltage filter circuit formation.
As described in Fig. 1～Fig. 7, with the input termination mine AC low-tension electrical network of input filter rectifier, be a direct current voltage with the mine ac voltage rectifier, its output is connected to the high-frequency inverter circuit input; The direct voltage inversion that high-frequency inverter circuit will be imported filter rectifier output is to input to output rectifier and filter after a series of high-frequency PWM pulses of EDM Generator of Adjustable Duty Ratio, and the output constant DC was pressed signal after output rectifier and filter carried out rectifying and wave-filtering to this high-frequency PWM pulse; The control impuls generative circuit constantly changes the duty ratio of high-frequency inverter circuit output pwm pulse by gathering the output voltage current signal, and then guarantees that the direct voltage of output rectifier and filter output is invariable; The direct voltage that is input as the output of input filter rectifier of controller interior power supply circuit will provide+the 15V power supply for the control impuls generative circuit after this direct voltage step-down; Whether the safety protection circuit moves normally by harvester output voltage and load current judgment means, if break down, turn-offs the output mos FET switching tube in the safety protection circuit immediately, thus shearing device output; Output current collection and output voltage filter circuit will install by the method for series connection small resistor in the output loading loop and give the safety protection circuit after output current is converted to voltage signal.
As described in Figure 1, be input filter rectifier of the present invention.L and N are the device ac input end, connect mine low-voltage alternating-current electrical network; PTC is the thermistor that is used for the long-term overload of anti-locking apparatus; F1 is the fuse that is used for anti-locking apparatus internal short-circuit or AC network short circuit; RV1 is the piezo-resistance that is used to suppress occur owing to thunderbolt, static etc. instantaneous overvoltage; Differential mode interference suppresses capacitor C 1 and C4, common mode disturbances suppresses capacitor C 2 and C3 and common mode inhibition inductance L 12 component devices input EMC filter, this filter can prevent the normal operation of the interference signal countermeasure set of mine AC network on the one hand, and the interference that anti-on the other hand locking apparatus self produces seals in electrical network; Single-phase full wave rectifier bridge BR is a direct voltage with ac voltage rectifier, and DC+ and DC-are the DC bus-bar voltage U of input filter rectifier output
DCPositive pole and negative pole.
As described in Figure 2, be high-frequency inverter circuit of the present invention.DC+ and DC-are the output of input filter rectifier; CJ1 and CJ2 are dc bus dividing potential drop voltage stabilizing electrochemical capacitor, and CJ1 must be the identical electrochemical capacitor of appearance value size with CJ2; R3 and R4 are equilibrium partial pressure resistance, guarantee that two electrochemical capacitor two ends pressure drops of CJ1 and CJ2 are identical; T11 is a driving transformer, its 1 pin PULSE1 and 2 pin PULSE2 connect the pwm pulse signal of control impuls generative circuit output, and its secondary 3,4 pins and 5,6 pins connect grid G and the source S of high-frequency inversion MOSFET pipe T1 and T2 respectively after resistance R10 and R12 current limliting; D5 and D7 are that transformer secondary transient overvoltage suppresses use Transient Suppression Diode, prevent that transformer secondary winding from puncturing between the back-emf of MOSFET pipe shutdown moment generation is with the grid of MOSFET and source electrode; D6 and D8 are the diode that prevents reverse direction current flow; Resistance R 9 and R11 provide an energy consumption loop for the self-induction of loop electromotive force; T1 and T2 are high-frequency inversion switch mosfet pipe, can be with DC bus-bar voltage U by turning on and off of T1 and T2
DCInversion is the high-frequency PWM pulse U of EDM Generator of Adjustable Duty Ratio
PWMResistance R 5 and R6 are the dc bus grading resistor; D2, D3, D10 and D11 are for suppressing instantaneous overvoltage and overcurrent Transient Suppression Diode; The buffering that capacitor C 8, diode D9, resistance R 13 and R14 constitute T1 absorbs circuit, and the buffering that capacitor C 7, diode D4, resistance R 7 and R8 constitute T2 absorbs circuit, is used to reduce the switching loss of T1 and T2; ZL-1 and ZL-2 are the output of high-frequency inverter circuit.
As described in Figure 3, be output rectifier and filter of the present invention.The output ZL_1 and the ZL_2 of its input termination high-frequency inverter circuit; TR1 is a step-down isolation transformer; R1 and C6 are the absorption resistance and the electric capacity of transformer TR1 primary coil, and C5 is the logical capacitance of handing in the former limit of TR1; D15 and D16 are the output rectifier diode, positive half cycle at pwm pulse, the D15 conducting, the negative half period of pwm pulse, the D16 conducting, D15 and D16 alternate conduction are the high frequency single-polarity pwm pulse with the rectification of high frequency bipolarity pwm pulse, pass through by inductance L 1 and L2 again, and the voltage regulation filtering network that capacitor C 17 and C19 and electrochemical capacitor CJ11 and CJ12 form is shaped as constant DC with the high frequency single-polarity pwm pulse and presses; Diode D1 and resistance R 32 constitute the absorption circuit of inductance L 1, and diode D17 and resistance R 35 constitute the absorption circuit of inductance L 2.
As described in Figure 4, be controller interior power supply circuit of the present invention.It is input as the direct voltage U of input filter rectifier output
DC, M1 is with U for DC/DC step-down module
DCStep-down is+direct voltage of 15V, and wherein CJ18 is the voltage regulation filtering electrochemical capacitor, and C29 is a filter capacitor, and R67 is dummy load.
As described in Figure 5, be control impuls generative circuit of the present invention.The input termination output rectifier and filter output dc voltage V-OUT and the current feedback signal IFB of control circuit are output as MOSFET turns on and off in the control high-frequency inverter circuit pulse signal PULSE1 and PULSE2; Among the figure+the 15V power supply is by Fig. 4 middle controller interior power supply circuit output voltage power supply, among the figure+the 5V power supply is by the power supply of switching power source chip IC1 internal reference output voltage, from the VREF pin output of switching power source chip IC1; Resistance R 33, R34 and R37, variable resistor VR1 and capacitor C 16 and C11 have formed the Voltage Feedback filter circuit of pulse generation circuit, wherein resistance R 33, R34 and R37 and variable resistor VR1 form resistor voltage divider network, output voltage V-OUT on resistance R 37 and variable resistor VR1 pressure drop V_FB and the reference voltage of switching power source chip IC1 the 2nd pin output compare, by comparing deviate adjustment output pwm pulse duty ratio, output voltage V-OUT is remained unchanged; R22 and R26 are divider resistance, and the pressure drop on the R26 provides reference voltage for 2 pin of switching power source chip IC1; Resistance R 27, capacitor C 12 and C14 form the high frequency feedback filter circuit, are used to suppress High-frequency Interference; Resistance R 21 and electrochemical capacitor CJ6 are switching power source chip IC1 soft-start time configuration resistance and electric capacity; Resistance R 21 and R28 are switching power source chip IC1 output pwm pulse Dead Time configuration resistance; Resistance R 29 and capacitor C 15 are external oscillation resistance of switching power source chip IC1 and electric capacity; Resistance R 20, R24 and R25, triode T4, diode D12 and electrochemical capacitor CJ5 have constituted device output voltage under-voltage protecting circuit, when installing owing to output short-circuit or seriously overload causes output voltage V-OUT on the low side, triode T4 turn-offs, and+5V voltage is connected to the 4th pin DT of switching power source chip IC1, i.e. Dead Time control pin by resistance R 20 and diode D12, pwm pulse is blocked, cut off output; R17 and R18 are the current feedback resistance of control impuls generative circuit; C10 is the current feedback filter capacitor; R23 and C13 constitute the filtering of the inner amplifier high frequency feedback of switching power source chip IC1, in order to suppress High-frequency Interference; Voltage-stabiliser tube D18, optocoupler IC2, resistance R 15, R19 and R42, triode T3 and electrochemical capacitor CJ3, CJ4 and CJ7 constitute control impuls generative circuit input voltage under-voltage protection circuit, and wherein DC+ and DC-meet the output U of input filter rectifier
DC, work as U
DCDuring greater than the voltage stabilizing value of voltage-stabiliser tube D18, optocoupler IC2 conducting, thus make triode T3 conducting ,+15V voltage is inserted the VCC pin of switching power source chip IC1, allows switching power source chip IC1 work, if U
DCBe lower than the voltage stabilizing value of voltage-stabiliser tube D18, optocoupler IC2 ends, and triode T3 turn-offs, and switching power source chip IC1 work ends; Resistance R 16, R16 ', R30 and R31 and triode T5, T6, T7 and T8 constitute the totem pole of control impuls generative circuit, when the E1 of switching power source chip IC1 pin is a positive pulse, and when the E2 pin is negative pulse, triode T6 and T8 conducting; Otherwise triode T5 and T7 conducting adopt the push-pull type way of output can improve the output driving force of switching power source chip IC1.
As described in Figure 6, be safety protection circuit of the present invention.Have three kinds of defencive functions: overcurrent protection, overpower protection and last electric protection.RS5 is the current protection sample resistance, when load current is flowed through RS5, produce pressure drop at the RS5 two ends, this voltage amplifies through inner amplifier, behind the voltage signal that load current is converted to its size of current is directly proportional, from the output of IOUT pin, voltage IOUT is connected to the positive input CIN1+ of power-monitoring chip U1 internal protection output comparator 1 after resistance R 46 and R47 dividing potential drop; Overpower protection output pin POUT has carried out multiplication operation in power-monitoring chip U1 inside, POUT pin output voltage values is the output voltage V-OUT of output rectifier and filter and the product of current sampling resistor pressure drop IOUT, and POUT pin output voltage divider resistance is made of R45 and R48; Powered on moment, can produce surge current in the load, this instantaneous surge current can produce higher voltage on IOUT, cause safety protection circuit mistake to turn-off MOSFET pipe Q1 or Q2, and the protective circuit that powers on is made of the RC charge circuit that electrochemical capacitor CJ15 and resistance R 43 constitute; Two P channel mosfet pipe Q1 and Q2 use switching tube for the protection action, and during operate as normal, the comparator output terminal COUT1 of U1 and COUT2 are low level, all energy conductings of Q1 and Q2, load operate as normal; When wherein a kind of fault took place, COUT1 or COUT2 are drawn high was high level, and Q1 or Q2 turn-off, and cut off output; Behind the failure removal, COUT1 and COUT2 revert to low level again, Q1 and Q2 conducting, load restoration operate as normal; R70 and R70 are respectively the grid pull-up resistor of Q1 and Q2; VCC_OUT among Fig. 6 is the load voltage positive polarity access point of apparatus of the present invention.
As described in Figure 7, be output current collection of the present invention and output voltage filter circuit.LED is the power supply output indicator among the figure, and R38 is the current-limiting resistance of LED; CJ8, CJ9 and CJ10 are the voltage regulation filtering electrochemical capacitor, C20 is a filter capacitor, R39 and R40 are the output dummy load, R2 is a voltage-stabiliser tube ZD3 current-limiting resistance, voltage of voltage regulation value+the 5V1 of voltage-stabiliser tube ZD3 output gives the U1 among Fig. 6 power supply, RS4 is the output current sample resistance, by RS4 output current signal is converted to voltage signal IFB, feeds back to the IC1 chip among Fig. 5.
Claims (7)
1. intrinsically-safe power supply device for mining; comprise the input filter rectifier; high-frequency inverter circuit; output rectifier and filter; the control impuls generative circuit; controller interior power supply circuit and safety protection circuit; it is characterized in that: the input termination mine low-voltage alternating-current electrical network of input filter rectifier; the input of its output DC crimping high-frequency inverter circuit; with the direct voltage inversion is the high-frequency PWM pulse; the high-frequency PWM pulse of high-frequency inverter circuit output connects the input of output rectifier and filter; the high-frequency PWM impulse commutation is filtered into the direct voltage of grade of rated voltage; the control impuls generative circuit passes through output voltage; current feedback generates the required pwm pulse of control high-frequency inverter circuit inversion; the direct voltage of the input termination input filter rectifier output of controller interior power supply circuit; export to the power supply of control impuls generative circuit middle controller, the safety protection circuit is realized safety protection by gathering output rectifier and filter output voltage and load current.
2. intrinsically-safe power supply device for mining as claimed in claim 1; it is characterized in that importing filter rectifier is by the input protection unit; input filter unit and rectifier bridge unit three parts constitute; the input termination mine low-voltage alternating-current electrical network of input protection unit wherein; output termination input filter unit; input filter unit output termination rectifier bridge unit input, rectification bridge output end connects the input of high-frequency inverter circuit.
3. intrinsically-safe power supply device for mining as claimed in claim 1; it is characterized in that high-frequency inverter circuit is by driving transformer; MOSFET and MOSFET protective circuit constitute; the PWM drive signal of the former edge joint control impuls generative circuit output of driving transformer wherein; secondary is connected with source electrode through the grid of resistance and MOSFET, and the MOSFET protective circuit is connected in parallel between MOSFET drain electrode and the source electrode.
4. intrinsically-safe power supply device for mining as claimed in claim 1, it is characterized in that output rectifier and filter is by the commutating pulse transformer, rectifier diode, inductance and electric capacity constitute, the output of the former edge joint high-frequency inverter circuit of commutating pulse transformer wherein, its secondary connects rectifier diode, inductance is connected on rectifies output DC loop, and electric capacity is connected in parallel in the rectifies output DC loop.
5. intrinsically-safe power supply device for mining as claimed in claim 1 is characterized in that the control impuls generative circuit is to be made of switching power source chip and electric current and voltage feedback circuit; Input termination load terminal voltage current feedback signal wherein, output is to be used to control the pwm pulse signal that high-frequency inverter circuit MOSFET turns on and off.
6. intrinsically-safe power supply device for mining as claimed in claim 1, it is characterized in that the controller interior power supply circuit is to be made of isolated form DC/DC step-down module, filtering capacitance of voltage regulation and dummy resistor load, the input termination input filter rectifier output of isolated form DC/DC step-down module wherein, filtering capacitance of voltage regulation and dummy resistor load are connected in parallel on the output of isolated form DC/DC step-down module.
7. intrinsically-safe power supply device for mining as claimed in claim 1; it is characterized in that the safety protection circuit is to be made of power-monitoring chip and switch mosfet pipe; power-monitoring chip input wherein connects voltage, the current signal of input filter rectifier output; the switch mosfet pipe is connected in the output rectifier and filter output voltage loop, and its state of turning on and off is the control level signal deciding by the output of power-monitoring chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010220652 CN101867298A (en) | 2010-07-03 | 2010-07-03 | Intrinsically-safe power supply device for mining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010220652 CN101867298A (en) | 2010-07-03 | 2010-07-03 | Intrinsically-safe power supply device for mining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101867298A true CN101867298A (en) | 2010-10-20 |
Family
ID=42958890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010220652 Pending CN101867298A (en) | 2010-07-03 | 2010-07-03 | Intrinsically-safe power supply device for mining |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101867298A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102013730A (en) * | 2010-12-04 | 2011-04-13 | 山西科达自控工程技术有限公司 | Underground intelligent intrinsic safety type power supply network |
| CN102624246A (en) * | 2012-03-23 | 2012-08-01 | 浙江大学宁波理工学院 | Single-ended forward parallel push-pull type high-power converter |
| CN104426345A (en) * | 2013-08-22 | 2015-03-18 | 海洋王（东莞）照明科技有限公司 | External soft start circuit of Buck converter |
| CN106061091A (en) * | 2016-08-17 | 2016-10-26 | 衢州昀睿工业设计有限公司 | Control circuit for switching power supply |
| CN107294177A (en) * | 2017-08-07 | 2017-10-24 | 上海山源电子科技股份有限公司 | Intrinsically safe miner lamp charging system and charging method thereof |
| CN107968574A (en) * | 2017-12-21 | 2018-04-27 | 广东省广播电视网络股份有限公司 | A kind of home network terminal equipment power adaption system and power supply adaptor |
| CN108667336A (en) * | 2018-06-01 | 2018-10-16 | 南京国电环保科技有限公司 | bipolar pulse generator |
| CN109149964A (en) * | 2018-08-28 | 2019-01-04 | 中国北方发动机研究所(天津) | A kind of alternator for vehicle power rectifier circuit with over-current over-voltage protection function |
| CN109462212A (en) * | 2018-11-12 | 2019-03-12 | 中国矿业大学 | A kind of adjustable intrinsic safety electric source rear end stop type protection circuit of analogue type guard time |
| CN109481010A (en) * | 2018-12-29 | 2019-03-19 | 天津美电医疗科技有限公司 | A kind of electricity ablating device |
| CN110970961A (en) * | 2018-12-06 | 2020-04-07 | 宁德时代新能源科技股份有限公司 | Power consumption protection circuit |
| CN111211549A (en) * | 2020-01-15 | 2020-05-29 | 天地（常州）自动化股份有限公司 | Intrinsic safety output port surge protection circuit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2084252U (en) * | 1990-07-09 | 1991-09-04 | 北京密云无线电厂 | Field effect power tube type high voltage dc-to ac converting power supper for mine |
| CN201081870Y (en) * | 2007-09-10 | 2008-07-02 | 山东金岭矿业股份有限公司 | Lighting power supply device of direct current locomotive in mine |
| CN101635523A (en) * | 2009-05-26 | 2010-01-27 | 山西晋城无烟煤矿业集团有限责任公司 | External mining intrinsic safety power supply |
| CN201409087Y (en) * | 2009-01-09 | 2010-02-17 | 西安蓝江电子科技有限公司 | Main circuit device for vehicle-mounted direct current converter for mine |
-
2010
- 2010-07-03 CN CN 201010220652 patent/CN101867298A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2084252U (en) * | 1990-07-09 | 1991-09-04 | 北京密云无线电厂 | Field effect power tube type high voltage dc-to ac converting power supper for mine |
| CN201081870Y (en) * | 2007-09-10 | 2008-07-02 | 山东金岭矿业股份有限公司 | Lighting power supply device of direct current locomotive in mine |
| CN201409087Y (en) * | 2009-01-09 | 2010-02-17 | 西安蓝江电子科技有限公司 | Main circuit device for vehicle-mounted direct current converter for mine |
| CN101635523A (en) * | 2009-05-26 | 2010-01-27 | 山西晋城无烟煤矿业集团有限责任公司 | External mining intrinsic safety power supply |
Non-Patent Citations (1)
| Title |
|---|
| 《煤炭科学技术》 20081031 王文清等 矿用本安直流稳压电源的设计与研究 第61-64、67页 1-7 第36卷, 第10期 * |
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102013730B (en) * | 2010-12-04 | 2012-12-05 | 山西科达自控工程技术有限公司 | Underground intelligent intrinsic safety type power supply network |
| CN102013730A (en) * | 2010-12-04 | 2011-04-13 | 山西科达自控工程技术有限公司 | Underground intelligent intrinsic safety type power supply network |
| CN102624246A (en) * | 2012-03-23 | 2012-08-01 | 浙江大学宁波理工学院 | Single-ended forward parallel push-pull type high-power converter |
| CN102624246B (en) * | 2012-03-23 | 2014-12-10 | 浙江大学宁波理工学院 | Single-ended forward parallel push-pull type high-power converter |
| CN104426345A (en) * | 2013-08-22 | 2015-03-18 | 海洋王（东莞）照明科技有限公司 | External soft start circuit of Buck converter |
| CN106061091B (en) * | 2016-08-17 | 2018-05-15 | 衢州昀睿工业设计有限公司 | A kind of control circuit of Switching Power Supply |
| CN106061091A (en) * | 2016-08-17 | 2016-10-26 | 衢州昀睿工业设计有限公司 | Control circuit for switching power supply |
| CN107294177A (en) * | 2017-08-07 | 2017-10-24 | 上海山源电子科技股份有限公司 | Intrinsically safe miner lamp charging system and charging method thereof |
| CN107294177B (en) * | 2017-08-07 | 2023-07-04 | 上海山源电子科技股份有限公司 | Intrinsic safety miner lamp charging system and charging method thereof |
| CN107968574A (en) * | 2017-12-21 | 2018-04-27 | 广东省广播电视网络股份有限公司 | A kind of home network terminal equipment power adaption system and power supply adaptor |
| CN107968574B (en) * | 2017-12-21 | 2023-08-29 | 广东省广播电视网络股份有限公司 | Power adapter system and power adapter for home network terminal equipment |
| CN108667336A (en) * | 2018-06-01 | 2018-10-16 | 南京国电环保科技有限公司 | bipolar pulse generator |
| CN108667336B (en) * | 2018-06-01 | 2023-10-24 | 南京国电环保科技有限公司 | Bipolar pulse generator |
| CN109149964A (en) * | 2018-08-28 | 2019-01-04 | 中国北方发动机研究所(天津) | A kind of alternator for vehicle power rectifier circuit with over-current over-voltage protection function |
| CN109462212A (en) * | 2018-11-12 | 2019-03-12 | 中国矿业大学 | A kind of adjustable intrinsic safety electric source rear end stop type protection circuit of analogue type guard time |
| CN110970961B (en) * | 2018-12-06 | 2021-06-08 | 宁德时代新能源科技股份有限公司 | Power consumption protection circuit |
| US11600992B2 (en) | 2018-12-06 | 2023-03-07 | Contemporary Amperex Technology Co., Limited | Electric protection circuit |
| CN110970961A (en) * | 2018-12-06 | 2020-04-07 | 宁德时代新能源科技股份有限公司 | Power consumption protection circuit |
| CN109481010A (en) * | 2018-12-29 | 2019-03-19 | 天津美电医疗科技有限公司 | A kind of electricity ablating device |
| CN109481010B (en) * | 2018-12-29 | 2023-10-20 | 电冷医疗科技(天津)有限公司 | Electric ablation device |
| CN111211549A (en) * | 2020-01-15 | 2020-05-29 | 天地（常州）自动化股份有限公司 | Intrinsic safety output port surge protection circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101867298A (en) | Intrinsically-safe power supply device for mining | |
| CN102638114A (en) | Power supply device of current transformer | |
| CN202634061U (en) | High-voltage switch monitoring system power supply for transformer station | |
| CN202150743U (en) | Coupling energy taking power supply system for high voltage transmission line fault monitoring | |
| CN103474965A (en) | Low-cost alternating-current input overvoltage protection circuit and switching power supply | |
| CN201075818Y (en) | Power adapter | |
| CN100511904C (en) | Switch power source for digital relay protection | |
| CN113054754A (en) | Double-coil inner-outer ring type induction energy-taking system | |
| CN101635523A (en) | External mining intrinsic safety power supply | |
| CN208226892U (en) | A kind of small-sized variable-frequency electric power voltage-stabilizer | |
| CN201584755U (en) | Current switching-on device for neutral point direct-current blocking equipment of transformer | |
| CN203590046U (en) | AC stabilized power supply for mining | |
| CN202602381U (en) | Power supply device of current transformer | |
| CN108336917A (en) | A kind of switching power circuit | |
| CN101064429A (en) | Burst current suppressing circuit and power supply equipment using the same | |
| CN202524057U (en) | Earth fault protection device of locomotive auxiliary power system and electric locomotive | |
| CN208797657U (en) | A kind of multi-functional more mouthfuls of output fast charge power supply | |
| CN201418038Y (en) | External intrinsic safety power supply for mining use | |
| CN208226890U (en) | A kind of switching power circuit | |
| CN203039338U (en) | A complementary energy acquiring circuit | |
| CN204538983U (en) | A kind of power of alterating and direct current | |
| CN206977324U (en) | Power circuit for low-voltage circuit breaker | |
| CN103475074B (en) | Unloaded low-loss battery charger | |
| CN203660889U (en) | LED driving power source circuit | |
| CN206099340U (en) | Adopt dual input's fan control ware |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20101020 |