CN104578876A - Portable three-phase power supply applied to inflammable and explosive environments - Google Patents
Portable three-phase power supply applied to inflammable and explosive environments Download PDFInfo
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- CN104578876A CN104578876A CN201310486079.9A CN201310486079A CN104578876A CN 104578876 A CN104578876 A CN 104578876A CN 201310486079 A CN201310486079 A CN 201310486079A CN 104578876 A CN104578876 A CN 104578876A
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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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
- H02M7/53871—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
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Abstract
The invention discloses a portable three-phase power supply applied to inflammable and explosive environments. The power supply comprises a lithium battery pack, an inverting control circuit, a main circuit and an explosion-proof case, wherein the inverting control circuit comprises a power supply circuit, a lithium battery pack voltage detection circuit, a single-chip microcomputer circuit, a sine pulse width modulation pulse-generating circuit and a main circuit interface circuit; the power supply circuit consists of a DC (direct current)-DC power supply module and comprises a +5V DC power supply for the inverting control circuit as well as four +15V DC power supplies which are used for the main circuit and independent of one another; the lithium battery pack voltage detection circuit consists of a voltage division circuit and an analog/digital converting circuit; the main circuit is an IPM (intelligent power module); the main circuit interface circuit comprises a connecting wire socket and an optoelectronic isolator. According to the portable three-phase power supply, the lithium iron phosphate lithium battery pack is used as a three-phase 127-V AC (alternating current) power output of a handheld electrical equipment DC source in the inflammable and explosive environments.
Description
Technical field
The present invention relates to the portable three-phase 127V electrical source of power that the inflammable and explosive Environment space of industry such as a kind of colliery, petrochemical industry use.
Background technology
Lithium iron phosphate lithium battery is a kind of novel battery grown up in recent years, it has, and operating temperature range is wide, input-output power is large, the life-span is long, high temperature resistant, non-maintaining, Large Copacity, environmental protection, many advantages such as self-discharge rate is low, consistency good, memory-less effect.Performance due to it is particularly suitable for the application doing electrical source of power aspect, also has people that it is called " lithium iron phosphate dynamic battery ".The excellent in performance of lithium iron phosphate dynamic battery also result in the concern of the industry such as colliery, petrochemical industry each side personage, just putting forth effort on a lithium iron phosphate dynamic battery and relevant technologies combines, transforms, be made into the stand-by power supply in inflammable and explosive Environment space, emergency power supply, electrical source of power etc., to solve the different demands to various power supply such as electric locomotive, large power-consuming equipment, hand-hold type electric equipment, urgent danger prevention facility used in this kind of Environment space, and then ensure normally carrying out of bargh's safety in production.
Along with the progress and development of science and technology, on ground, various occasion obtains sufficient development, promotion and application to the hand-hold type electric equipments such as electric hand drill, Handheld grinding machine, hand-held electric wrench, to raising labour productivity, ensuring safety in production and the aspect such as product quality plays an important role.But even to this day, because the particularity of the industry such as colliery, petrochemical industry combustible and explosive area determined, the use of these industries to hand-hold type electric equipment has a series of regulation and restriction, causes the hand-hold type electric equipment of various advanced person to be difficult to be promoted in these places and apply." safety regulations in coal mine " is the very important regulation file of China's coal-mine industry one.In " safety regulations in coal mine " (annex one), to the explanation of nouns of hand-hold type electric equipment be: " must keep and the electric equipment of mobile device body and collaborative work with staff at work, be called hand-hold type electric equipment ".Specify in " safety regulations in coal mine " the 448th article the power supply of illumination, signal, phone and the hand-hold type electric equipment " must not more than 127V ".This regulation considers from the angle of safety in production, is a correct regulation.But this correct regulation causes huge obstacle and restriction to applying of hand-hold type electric equipment again.Because some place of underground coal mine three-phase 127V power supply cannot arrive, and use three-phase 127V power supply also loaded down with trivial details will stop power transmission formality through reporting to the higher authorities at different levels for approval, fulfiling, thus cause hand-hold type electric equipment still very few so far in the use of underground coal mine, the hand-hold type electric equipment of various advanced person is difficult to be widely applied.
By technological innovation ferric phosphate lithium cell and relevant charging circuit, inverter circuit, the organic supporting combination of flame proof cabinet, for the inflammable and explosive Environment space of the industry such as colliery, petrochemical industry provides a kind of applicable portable three-phase 127V electrical source of power, and then drive diversified, advanced hand-hold type electric equipment to apply widely at inflammable and explosive Environment space, be a useful cause having that social effect has great economic benefit concurrently.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of this invention is to provide the portable three-phase electrical source of power that a kind of inflammable and explosive environment uses, be suitable in inflammable and explosive environment to solve, using the technical problem that lithium iron phosphate lithium battery group exports as the three-phase 127V AC power of hand-hold type electric equipment DC source.
In order to realize foregoing invention object, the technical solution adopted in the present invention is as follows:
The portable three-phase electrical source of power that inflammable and explosive environment uses, comprises lithium battery group, inverter control circuit, main circuit and explosion-proof housing; Described inverter control circuit comprises power circuit, lithium battery group voltage detecting circuit, single chip circuit, sinusoidal pulse width modulation pulse generating circuit and main circuit interface circuit; Described power circuit is made up of DC-DC power module, and+5V the DC power supply, four tunnels that comprise a road confession inverter control circuit supply main circuit and+15V DC power supply independent of each other; Described lithium battery group voltage detecting circuit is made up of bleeder circuit and A/D conversion circuit, and the voltage signal of lithium battery group transports to the analog input end of A/D conversion circuit after bleeder circuit, and digital conversion results output connects single-chip microcomputer; Data/the address of described sinusoidal pulse width modulation pulse generating circuit, Read-write Catrol, address latch, clock, reset, output forbid that each pin is connected with the respective pins of described single-chip microcomputer respectively, its six tunnel Sine Wave Pulse Width Modulation signals exported, pass through amplification driving circuit, through photoelectric coupler isolation, deliver to the separate three-phase inversion brachium pontis in six tunnels of described main circuit by main circuit interface circuit, and control it and connect in order; Described main circuit is IPM Intelligent Power Module, it comprises insulating gate type field effect tube and drive circuit thereof, the pin of its three upper brachium pontis drive circuits needs independent supply 15V separately to control power supply, three lower brachium pontis drive circuits separately need a 15V to control power supply, and U, V, W terminal connects three-phase ac power supply; Described main circuit interface circuit comprises hook-up wiring receptacle and photoisolator, this hook-up wiring receptacle comprises four tunnel+15V DC power supply independent of each other, exports six tunnel Sine Wave Pulse Width Modulation signals, described photoisolator input is connected with the warning output pin of main circuit by main circuit interface circuit, output connects the alarm detection end of single-chip microcomputer, and the driving locking end of single-chip microcomputer is connected with the SET TRIP pin of sinusoidal pulse width modulation pulse generating circuit.
Advantage of the present invention and good effect as follows: achieve the three-phase 127V AC power not relying on centrally connected power supply, lithium iron phosphate dynamic battery and relevant technologies are combined, be made into the portable stand-by power supply, emergency power supply, electrical source of power etc. in inflammable and explosive Environment space, to solve the different demands to various power supply such as electric locomotive, large power-consuming equipment, urgent danger prevention facility used in this kind of Environment space, and then ensure normally carrying out of bargh's safety in production.
Accompanying drawing explanation
Fig. 1 is composition frame chart of the present invention.
Fig. 2 is the power circuit of inverter control circuit of the present invention.
Fig. 3 is the SPWM pulse-generating circuit of inverter control circuit of the present invention.
Fig. 4 is the microcontroller system circuit of inverter control circuit of the present invention.
Fig. 5 is lithium battery group voltage detecting circuit of the present invention.
Fig. 6 is the interface circuit of inverter control circuit of the present invention to inverter main circuit.
Fig. 7 is inverter main circuit of the present invention.
Fig. 8 is inverter control circuit schematic diagram of the present invention.
Embodiment
See Fig. 1, portable three-phase 127V electrical source of power of the present invention is made up of four parts such as ferric phosphate lithium cell group, inverter control circuit, inverter main circuit and explosion-proof housings.Wherein, inverter control circuit comprise power circuit, lithium battery group voltage detecting circuit, single chip circuit, SPWM pulse generating circuit and main circuit interface circuit etc. five part composition.Power circuit provides applicable power supply to other each several part circuit, single chip circuit detects the battery voltage obtained according to lithium battery group voltage detecting circuit, real-time calculating inversion parameter, implement to control to SPWM pulse generating circuit, and then export SPWM pulse by main circuit interface circuit to inverter main circuit, control inverter main circuit generation three-phase 127V interchange and export.All parts are installed in explosion-proof housing inside, guarantee the fail safe used in inflammable and explosive environment.
See Fig. 2, the power circuit of inverter control circuit uses DC-DC power module U11 ~ U15, + 24V DC the DC power supply taking from ferric phosphate lithium cell group is introduced from binding post J1, positive pole connects+24V input pin, negative pole connects with reference to zero potential pin GND24, positive pole respectively to after be connected to the DC power supply input pin Vin of DC-DC power module U11 ~ U15, negative pole respectively to after be connected to the DC power supply of DC-DC power module U11 ~ U15 with reference to zero potential pin GND.Through conversion, obtain a road+5V DC, four tunnel+15V DC independent of each other DC power supply.
Wherein, DC-DC power module U11 exports+5V DC DC power supply, export the power input pin VCC that DC power anode Vout connects singlechip chip U1, the power input pin VDD of sinusoidal pulse width modulation ripple generation chip U2, power supply/reference voltage source input pin the VCC/Vref of A/D conversion chip U16, the power input pin VCC of integrated NOT gate chip U3, the anode A of the input side diode of photoelectrical coupler chip U4 ~ U9, No. 4 pin isolation and amplifier sidelight electricity transistor collector pins of photoelectrical coupler U10, export the reference zero potential pin GND that DC power cathode connects singlechip chip U1, the reference zero potential pin VSS of sinusoidal pulse width modulation ripple generation chip U2, the reference zero potential pin GND of A/D conversion chip U16, the reference zero potential pin GND of integrated NOT gate chip U3, the negative electrode K of the input side diode of photoelectrical coupler chip U4 ~ U9, No. 3 pin isolation and amplifier sidelight electricity transistor emitter pins of photoelectrical coupler U10, for U1 ~ U10 and U16 provides its work necessary DC power supply.
DC-DC power module U12 ~ U15 exports four tunnel+15V DC independent of each other DC power supply, for inverter main circuit.U12 output DC source positive pole pin Vout meets the outlet side DC power supply VCC of photoelectrical coupler chip U4, and output meets the outlet side phototriode emitter pin E of photoelectrical coupler chip U4 with reference to zero potential pin GND; U13 output DC source positive pole pin Vout meets the outlet side DC power supply VCC of photoelectrical coupler chip U5, and output meets the outlet side phototriode emitter pin E of photoelectrical coupler chip U5 with reference to zero potential pin GND; U14 output DC source positive pole pin Vout meets the outlet side DC power supply VCC of photoelectrical coupler chip U6, and output meets the outlet side phototriode emitter pin E of photoelectrical coupler chip U6 with reference to zero potential pin GND; U15 output DC source positive pole pin Vout meets the outlet side DC power supply VCC of photoelectrical coupler chip U7 ~ U9, and output meets the outlet side phototriode emitter pin E of photoelectrical coupler chip U7 ~ U9 with reference to zero potential pin GND.
Between the reference zero potential pin GND that 1 μ f capacitor C13 ~ C17 is connected across the+24V DC DC supply input of DC-DC power module U11 ~ U15 and input direct-current source positive pole Vin, play the effect of filtering input power ripple; 1 μ f capacitor C18 ~ C22 is connected in parallel on the reference zero potential GND of the output of DC-DC power module U11 ~ U15 and exports between DC source positive pole Vout, plays the effect improving output ripple, improve control power quality.
Generation see Fig. 3, SPWM pulse train adopts dedicated IC chip SA4828.Its data/address pin AD0 ~ AD7 connects P0.0 ~ P0.7 pin of single-chip microcomputer; Read-write Catrol pin nWR connects single-chip microcomputer pin P2.7, and nRD connects single-chip microcomputer pin P2.6; Address latch pin ALE connects single-chip microcomputer pin P2.5; Clock input pin CLK connects single-chip microcomputer pin P1.0; Reset pin nRESET connects single-chip microcomputer pin P2.4, exports and forbids that pin SET TRIP connects single-chip microcomputer pin P2.3; Interface selects pin MUX to connect+5V DC power supply, chooses and uses multiplexed data/address interface.Six road SPWM pulses are exported by RPHT, YPHT, BPHT, RPHB, YPHB, BPHB pin, after entering 74HC06 amplification driving, after photoelectrical coupler U4 ~ U9 isolates, connect main circuit.Light-emitting diode D8 connects the nTRIP pin of SA4828, is used to indicate the state of pulse blocking.
See Fig. 4, the single chip circuit of inverter control circuit is the minimum system of a single-chip microcomputer, by singlechip chip U1, the electrify restoration circuit that resistance R23, electric capacity C27 are formed, the clock circuit that electric capacity C28, C29, passive crystal oscillator Y1 form, and the download port J2 using asynchronous serial communication interface to realize in-system programmable components (ISP) forms.Single-chip microcomputer runs the program of its inside, controls the workflow of whole device.
Singlechip chip U1 is the core of inverter control circuit.Except power circuit, it normally works must be aided with reset circuit, clock circuit.Reset circuit is made up of 0.1 μ f capacitor C27,10k Ω resistance R23, and be connected across after C27, R23 series connection between+5V DC DC source positive pole and reference zero potential, 1. tie point is connected to the reset pin RESET of U1.Clock circuit is made up of the passive crystal oscillator Y1 of 30pf capacitor C28, C29 and 12MHz, crystal oscillator Y1 is connected across between the clock input pin X1 of U1 and clock out pin X2, and C28, C29 are then connected across between two pins of crystal oscillator Y1 and reference zero potential respectively.
During system electrification, the capacitor C27 in reset circuit is charged by resistance R23, carries out reset operation to singlechip chip U1; Crystal oscillator Y1 in clock circuit capacitor C28, C29 auxiliary under, export the clock pulse of the 12MHz of fixed frequency to singlechip chip U1.After reseting procedure terminates, singlechip chip U1 brings into operation the software program of its inside.
First, the reset pin nRST that singlechip chip U1 drives its universal input/output pin P24 to connect sinusoidal pulse width modulation ripple generation chip U2 is low level, offset of sinusoidal pulse width modulated wave generation chip U2 carries out reset operation, make it to restPose, prepare to receive the configuration order from singlechip chip U1.
Second step, singlechip chip U1 detects ferric phosphate lithium cell group voltage.The voltage of ferric phosphate lithium cell group introduces inversion control plate by No. 2 pins of port J3, and through precision potentiometer R22 dividing potential drop, the centre tap pin U_DC_AD of R22 is connected to the passage 0 analog input pin CH0 of A/D conversion chip U16.Universal input/output pin the T1 of singlechip chip U1 is connected to the clock pins CLK of A/D conversion chip U16, uses the timer function circuit that single-chip microcomputer is inner integrated, sends the clock pulse controlling its operating rate speed to U16; Universal input/the output pin of singlechip chip U1
the data-out pin of connecting analog/digital translation chip U16, writes control register numerical value and conversion command to U16; Export from the data output pins DO of A/D conversion chip U16 after analog quantity converts digital quantity to, and from the universal input/output pin of connected singlechip chip U1
enter single-chip microcomputer inside.Single-chip microcomputer, through computing, converts thereof into corresponding ferric phosphate lithium cell group voltage, and along with the change of battery power discharge voltage, calculates the control register numerical value of pulse width modulated wave generation chip U2.
3rd step, singlechip chip U1 controls sinusoidal pulse width modulation ripple generation chip U2 output pulse sequence.Universal input/output pin P00 ~ the P07 of singlechip chip U1 connects the address/data I/O pin AD0 ~ AD7 of sinusoidal pulse width modulation ripple generation chip U2, forms address/data port.As control pin, universal input/output pin the P25 of U1 connects the address latch pin ALE (AS) of U2, universal input/output pin the P26 of U1 connects command/data instruction pin nRD (DS) of U2, and the universal input/output pin P27 of U1 connects the Read-write Catrol pin nWR (W/R) of U2.Singlechip chip runs initialize routine, drived control pin output control pulse is required according to the read-write sequence of sinusoidal pulse width modulation ripple generation chip U2, address, data sequence are then written to initialization register and the control register of U2 from address/data port, to set the parameters such as frequency of modulated wave, modulating wave amplitude, Dead Time, minimum deletion pulsewidth, make U2 can export six tunnel sinusoidal pulse width modulation ripples from pulse output pin RPHT, YPHT, BPHT, RPHB, YPHB, BPHB.
Pulse output pin RPHT, YPHT, BPHT, RPHB, YPHB, BPHB of sinusoidal pulse width modulation ripple generation chip U2 connect the input of U3A, U3B, U3C, U3D, U3E, U3F six not gates of integrated NOT gate chip U3 respectively, pulse train, through anti-phase and amplify and drive, is connected the negative electrode K of the input side diode of photoelectrical coupler chip U4 ~ U9 through current-limiting resistance R7 ~ R12 by the non-gate output terminal of U3.
3rd step, main circuit, under the control of inverter control circuit, completes inversion.Photoelectrical coupler chip U4 ~ U9 is isolated output pulse sequence by light signal, boosts, and drives main circuit intelligent power module.According to electricity consumption loading demand: three-phase 127V voltage and 2KW power motor use, needing battery strings to be unified into 260V voltage gradation through calculating, when ensureing margin of operation, selecting maximum discharge current 30A main circuit and related device.Battery voltage is connected to DC terminal P, the N of intelligent power module; Threephase load is connected to U, V, W end.Intelligent power module includes by 6 mutual independently three-phase inversion brachium pontis, and its conducting or shutoff are namely by the input control of 6 tunnel sinusoidal pulse width modulation ripples through light-coupled isolation.Wherein on 3 tunnels, brachium pontis optocoupler signal and 3 tunnels independently control driving power and connect port pinout 1 to 9 respectively, brachium pontis break-make on control IPM; Under other three tunnels, brachium pontis 3 road optocoupler signal and 1 tunnel control driving power and connect respective drive pin 11 to 15 respectively, brachium pontis break-make under control IPM.The Control timing sequence of the sinusoidal pulse width modulation ripple produced according to control circuit, the direct current at battery pack two ends flows through upper and lower bridge arm and load in order, thus forms three phase sine alternating current in load inside.
4th step, whether microprocessor detect main circuit has to report to the police exports.If there is abnormal alarm in the intelligent power module of main circuit, then alarm signal sends low level signal from warning output No. 15 pins, No. 2 pins of photoelectrical coupler chip U10 are connected to after inversion control plate resistance R20 current limliting, drive input side diode cathode luminous and cause the conducting of outlet side phototriode, then outlet side phototriode emitter 3 is communicated with collector electrode 4, emitter 3 presents high level, and by connecting the universal input/output pin P22 of singlechip chip U1, single-chip microcomputer is enable intelligent power module alarm signal to be detected, and drive the universal input of U1/output pin P23 to be connected to sinusoidal pulse width modulation ripple generation chip U2 forbid output pin nTRIP, force pulse train output pin RPHT, YPHT, BPHT, RPHB, YPHB, BPHB stops output pulse sequence, and present high-impedance state, play the effect of protection main circuit.
Resistance R21 is connected to No. 3 pin outlet side phototriode emitters of photoelectrical coupler chip U10, and its effect keeps No. 3 pins to be the effect of low level state when intelligent power module is not reported to the police and exported.Capacitor C23 is connected across between the outlet side phototriode emitter of photoelectrical coupler chip U10, collector electrode, plays the effect of stable outputs level signals.
So far, program major cycle is finished, and jumps to second step ferric phosphate lithium cell group voltage detecting link and continues circulation execution.
See Fig. 5, ferric phosphate lithium cell group voltage detecting circuit is made up of bleeder circuit and A/D conversion circuit.Battery voltage is accessed by J3, after precision potentiometer R22 dividing potential drop, enters integrated circuit (IC) chip U16, and analog quantity voltage is converted into corresponding digital quantity.The data output pins DO of U16 connects single-chip microcomputer No. 16 pin WR, and data-out pin DI connects single-chip microcomputer No. 17 pin RD, and clock input pin CLK connects single-chip microcomputer No. 15 pin T1.Single-chip microcomputer uses its timer internal generated clock pulse signal, be supplied to U16 internal logic to use, read out transformation result digital quantity from DO pin, know present battery group voltage, and regulate SA4828 to export the parameter of SPWM pulse train accordingly, reach the object of stable output AC voltage.
See Fig. 6,7, the major function of inverter control circuit to the interface circuit of inverter main circuit connects main circuit backward, four tunnel+15V DC independent of each other power supplys are provided to main circuit, export six road SPWM pulse trains, the warning of main circuit is exported and realizes Phototube Coupling, the photoelectric isolating circuit comprising hook-up wiring receptacle J4, J5 and be made up of resistance R20, R21, electric capacity C23, photoelectrical coupler U10.Photoelectrical coupler U10 exports ALM and connects single-chip microcomputer pin P2.2, the low and high level state of this pin of microprocessor detect, if define warning, single-chip microcomputer then drives the SET TRIP pin of SA4828, implements SPWM pulse initiatively and exports locking.
Inverter main circuit completes ferric phosphate lithium cell group sends three phase sine alternating current function through the controlled SPWM pulse of power-type power transistor.Intelligent Power Module (IPM) is the device integrating igbt (IGBT), IGBT drive circuit and self-protection circuit, includes overcurrent protection, short-circuit protection, overtemperature protection, the under voltage protection of control power supply and outside output alarm function.P, N terminal connects battery pack DC power supply, and U, V, W terminal connects three-phase ac power supply and exports, and 1,2,3,4,5,6,7,8,9 pin are three upper brachium pontis drive circuits, and need independent supply 15V separately to control power supply, 10 to 14 pin are three lower brachium pontis drive circuits, another need 15V controls power supply, 15 pin are that alarm signal exports, and need 5V to control power supply, control must insulate between power supply and battery power, control power supply GND to be connected with IPM inside between battery pack GND, outside mustn't be done again and be connected.The cut-off level resistance of the external overcurrent protection of N1, N2 pin.Capacitor in circuit diagram is the use revising distribution impedance.
The composition of each circuit unit is always schemed above, see Fig. 8.
Claims (1)
1. a portable three-phase electrical source of power for inflammable and explosive environment use, is characterized in that, comprise lithium battery group, inverter control circuit, main circuit and explosion-proof housing; Described inverter control circuit comprises power circuit, lithium battery group voltage detecting circuit, single chip circuit, sinusoidal pulse width modulation pulse generating circuit and main circuit interface circuit; Described power circuit is made up of DC-DC power module, and+5V the DC power supply, four tunnels that comprise a road confession inverter control circuit supply main circuit and+15V DC power supply independent of each other; Described lithium battery group voltage detecting circuit is made up of bleeder circuit and A/D conversion circuit, and the voltage signal of lithium battery group transports to the analog input end of A/D conversion circuit after bleeder circuit, and digital conversion results output connects single-chip microcomputer; Data/the address of described sinusoidal pulse width modulation pulse generating circuit, Read-write Catrol, address latch, clock, reset, output forbid that each pin is connected with the respective pins of described single-chip microcomputer respectively, its six tunnel Sine Wave Pulse Width Modulation signals exported, pass through amplification driving circuit, through photoelectric coupler isolation, deliver to the separate three-phase inversion brachium pontis in six tunnels of described main circuit by main circuit interface circuit, and control it and connect in order; Described main circuit is IPM Intelligent Power Module, it comprises insulating gate type field effect tube and drive circuit thereof, the pin of its three upper brachium pontis drive circuits needs independent supply 15V separately to control power supply, three lower brachium pontis drive circuits separately need a 15V to control power supply, and U, V, W terminal connects three-phase ac power supply; Described main circuit interface circuit comprises hook-up wiring receptacle and photoisolator, this hook-up wiring receptacle comprises four tunnel+15V DC power supply independent of each other, exports six tunnel Sine Wave Pulse Width Modulation signals, described photoisolator input is connected with the warning output pin of main circuit by main circuit interface circuit, output connects the alarm detection end of single-chip microcomputer, and the driving locking end of single-chip microcomputer is connected with the SET TRIP pin of sinusoidal pulse width modulation pulse generating circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310486079.9A CN104578876B (en) | 2013-10-16 | 2013-10-16 | Portable three-phase electrical source of power used in a kind of inflammable and explosive environment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310486079.9A CN104578876B (en) | 2013-10-16 | 2013-10-16 | Portable three-phase electrical source of power used in a kind of inflammable and explosive environment |
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| Publication Number | Publication Date |
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| CN104578876A true CN104578876A (en) | 2015-04-29 |
| CN104578876B CN104578876B (en) | 2017-10-24 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101976879A (en) * | 2010-10-27 | 2011-02-16 | 上海交通大学 | Mobile emergency power supply based on system converter |
| CN203504451U (en) * | 2013-10-16 | 2014-03-26 | 梁纯 | Portable three-phase power supply used in flammable and combustible environment |
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2013
- 2013-10-16 CN CN201310486079.9A patent/CN104578876B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101976879A (en) * | 2010-10-27 | 2011-02-16 | 上海交通大学 | Mobile emergency power supply based on system converter |
| CN203504451U (en) * | 2013-10-16 | 2014-03-26 | 梁纯 | Portable three-phase power supply used in flammable and combustible environment |
Non-Patent Citations (1)
| Title |
|---|
| 王建兵: "基于SPWM技术的测试电源的研究和设计", 《中国优秀硕士学位论文全文数据库 工程科技II辑》 * |
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Granted publication date: 20171024 Termination date: 20191016 |