CN205135817U - Ignition with power compensation function - Google Patents
Ignition with power compensation function Download PDFInfo
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- CN205135817U CN205135817U CN201520763174.3U CN201520763174U CN205135817U CN 205135817 U CN205135817 U CN 205135817U CN 201520763174 U CN201520763174 U CN 201520763174U CN 205135817 U CN205135817 U CN 205135817U
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- pulse width
- frequency modulation
- width modulator
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Abstract
The utility model relates to an ignition with power compensation function, including energy converting circuit, transformer and energy storage discharge circuit. Power compensation function is realized by energy converting circuit, specifically includes pulse width modulator, MOS pipe, sampling resistor, frequency modulation electric capacity and frequency modulation resistance. Positive and transformer primary coil one end are connected to the pulse width modulator 7 foot, and the drain electrode of MOS pipe is connected to the transformer primary coil other end, and the pulse width modulator 6 foot is connected to MOS pipe grid, and the pulse width modulator 3 foot is connected MOS and is managed between source electrode and the sampling resistor, and the 5 feet negative pole of connecting concatenates frequency modulation resistance between pulse width modulator 4 foot and 8 feet, concatenates frequency modulation electric capacity between 4 feet and the ground. The utility model discloses when the power supply voltage of power reduced, field effect transistor extension power -on time reached the setting value up to the electric current, and the compensation makes the spark frequency of ignition output invariable because of voltage reduce loss's power.
Description
Technical field
The utility model relates to a kind of ignition mechanism for Aero-Engine Start, especially a kind of ignition mechanism with power back-off function.
Background technique
Ignition mechanism is widely used in the every field such as motor, starter motor, combustion engine, for the air-fuel mixture vapour of ignition combustion indoor.Its ignition mechanism is that low-voltage DC is passed into transformer, and when electric current ends instantaneously, electric energy will be coupled to transformer secondary coil and boost.Therefore by periodically carrying out conducting, cut-off to primary current, required high-voltage pulse can be obtained secondary, puncturing air, form electrical spark, realize ignition function.
Current ignition mechanism is mainly divided into contact type and self excited oscillation circuit formula two kinds.Contact point mode is coupling and the conversion that the magnetic force utilizing internal transformer to produce realizes that contact is periodically closed, disconnection controls electric energy; Self excited oscillation circuit mode utilizes coupling and the conversion that the resistance of transformer coil and collocation makes large power triode periodically conducting, cut-off controls electric energy.But when ignition mechanism is when occurring the situation that power supply voltage reduces, the power that electric energy can be made to change decreases, the spark frequency directly causing ignition mechanism to export reduces, and is unfavorable for ignition function, possibly cannot light air-fuel mixture vapour time serious.
Summary of the invention
For the deficiency of ignition mechanism in the past, a kind of function ignition device with power back-off of model utility, realize when power supply voltage reduces, can compensate electric energy transfer power, the spark frequency that assurance device exports is constant, thus make ignition mechanism in the gamut of operating voltage, all there is identical ignition ability.
Concrete technological scheme of the present utility model is, the described function ignition device with power back-off comprises: power conversion circuits, transformer and energy storage discharge circuit.Power back-off function is realized by power conversion circuits, specifically comprises pulse width modulator, metal-oxide-semiconductor, sampling resistor, frequency modulation electric capacity and frequency modulation resistance.Pulse width modulator 7 pin connects positive source and transformer one end, the transformer the other end connects metal-oxide-semiconductor drain electrode, metal-oxide-semiconductor grid connects pulse width modulator 6 pin, ground connection after metal-oxide-semiconductor source electrode connection sampling resistor, pulse width modulator 3 pin connects between metal-oxide-semiconductor source electrode and sampling resistor, 5 pin connect power cathodes, pulse width modulator 4 pin is connected in series frequency modulation resistance with between 8 pin, 4 pin be connected in series frequency modulation electric capacity between ground.The setup parameter of described ignition mechanism is:
(1) frequency modulation resistance: 1.9k Ω
(2) frequency modulation electric capacity: 33nF
(3) current setting value: 10A
(4) primary winding electric sensibility reciprocal: 20 μ H
Pulse width modulator, by the setting parameter output frequency of frequency modulation resistance, frequency modulation electric capacity, controls the power switch of field effect transistor as transformer by output terminal, and is detected the electric current in transformer by current sense input.During ignition mechanism work, field effect transistor conducting, powered to transformer by power supply, electric current constantly increases, when detecting that electric current reaches setting value, field effect transistor ends, electric energy, to secondary winding coupling, boosting, is charged to storage capacitor by silicon stack rectification, when storage capacitor both end voltage is higher than marked voltage of discharge tube, ignition mechanism is discharged, and forms electrical spark at the electricity place of chewing.
When the power supply voltage of power supply reduces, electric current increase in transformer is slower, but do not reach setting value owing to detecting electric current, field effect transistor can not end, but extend current"on"time until electric current reaches setting value, compensate because voltage reduces the power lost, the spark frequency that ignition mechanism is exported is constant.Therefore the utility model has power back-off function, can reduce the power loss caused by auto-compensation, ensure that the spark rate exported is constant because of power supply voltage.This ignition mechanism output characteristics is, when under voltage rating 28VDC, ignition mechanism spark frequency is 20Hz, and meanwhile, when within the scope of operating voltage 16VDC ~ 32VDC, ignition mechanism spark frequency is 20Hz.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
As shown in the figure, described a kind of function ignition device with power back-off comprises: power conversion circuits I, transformer II and energy storage discharge circuit III, power back-off function is realized by power conversion circuits, specifically comprise pulse width modulator 101, metal-oxide-semiconductor 102, sampling resistor 103, frequency modulation electric capacity 104 and frequency modulation resistance 105, 7 pin of described pulse width modulator 101 connect positive source and transformer one end, the transformer the other end connects the drain electrode of metal-oxide-semiconductor 102, the grid of metal-oxide-semiconductor 102 connects 6 pin of pulse width modulator 101, the source electrode of metal-oxide-semiconductor 102 connects the rear ground connection of sampling resistor 103, between the source electrode of 3 pin connection metal-oxide-semiconductors 102 of pulse width modulator 101 and sampling resistor 103, 5 pin connect power cathode, 4 pin of pulse width modulator 101 are connected in series frequency modulation resistance 105 with between 8 pin, 4 pin be connected in series frequency modulation electric capacity 104 between ground.The setup parameter of described ignition mechanism is:
(1) frequency modulation resistance: 1.9k Ω;
(2) frequency modulation electric capacity: 33nF
(3) current setting value: 10A;
(4) primary winding electric sensibility reciprocal: 20 μ H.
Claims (2)
1. one kind has the ignition mechanism of power back-off function, it is characterized in that, described device comprises power conversion circuits I, transformer II and energy storage discharge circuit III, described power conversion circuits comprises pulse width modulator 101, metal-oxide-semiconductor (102), sampling resistor (103), frequency modulation electric capacity (104) and frequency modulation resistance (105), 7 pin of described pulse width modulator (101) connect positive source and transformer one end, the transformer the other end connects the drain electrode of metal-oxide-semiconductor (102), the grid of metal-oxide-semiconductor (102) connects 6 pin of pulse width modulator (101), the source electrode of metal-oxide-semiconductor (102) connects sampling resistor (103) ground connection afterwards, between the source electrode of 3 pin connection metal-oxide-semiconductor (102) of pulse width modulator (101) and sampling resistor (103), 5 pin connect power cathode, 4 pin of pulse width modulator (101) be connected in series frequency modulation resistance (105) between 8 pin, 4 pin be connected in series frequency modulation electric capacity (104) between ground.
2. a kind of ignition mechanism with power back-off function as claimed in claim 1, it is characterized in that, the setup parameter of described ignition mechanism is:
(1) frequency modulation resistance: 1.9k Ω;
(2) frequency modulation electric capacity: 33nF;
(3) current setting value: 10A;
(4) primary winding electric sensibility reciprocal: 20 μ H.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520763174.3U CN205135817U (en) | 2015-09-29 | 2015-09-29 | Ignition with power compensation function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520763174.3U CN205135817U (en) | 2015-09-29 | 2015-09-29 | Ignition with power compensation function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205135817U true CN205135817U (en) | 2016-04-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520763174.3U Active CN205135817U (en) | 2015-09-29 | 2015-09-29 | Ignition with power compensation function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205135817U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105156215A (en) * | 2015-09-29 | 2015-12-16 | 哈尔滨东安发动机（集团）有限公司 | Ignition device having power compensation function |
| CN109004637A (en) * | 2018-08-10 | 2018-12-14 | 德州三和电器有限公司 | A kind of arc discharge CNC high-pressure transformer and its control method |
-
2015
- 2015-09-29 CN CN201520763174.3U patent/CN205135817U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105156215A (en) * | 2015-09-29 | 2015-12-16 | 哈尔滨东安发动机（集团）有限公司 | Ignition device having power compensation function |
| CN109004637A (en) * | 2018-08-10 | 2018-12-14 | 德州三和电器有限公司 | A kind of arc discharge CNC high-pressure transformer and its control method |
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