CN204004685U - Oil sucting valve current closed-loop control circuit - Google Patents
Oil sucting valve current closed-loop control circuit Download PDFInfo
- Publication number
- CN204004685U CN204004685U CN201420441726.4U CN201420441726U CN204004685U CN 204004685 U CN204004685 U CN 204004685U CN 201420441726 U CN201420441726 U CN 201420441726U CN 204004685 U CN204004685 U CN 204004685U
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- China
- Prior art keywords
- connects
- timers
- control circuit
- oil sucting
- sucting valve
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- Expired - Lifetime
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- 239000004065 semiconductor Substances 0.000 claims abstract description 15
- 230000005669 field effect Effects 0.000 claims description 14
- 238000005516 engineering process Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 14
- 230000003321 amplification Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010710 diesel engine oil Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical group 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model relates to oil sucting valve control circuit technical field, a kind of oil sucting valve current closed-loop control circuit specifically, in current closed-loop control circuit, be provided with operational amplifier (1) and 555 timers (2), operational amplifier (1) forms differential amplifier circuit, the output terminal of operational amplifier (1) connects the THRES end of 555 timers (2), the CON end of 555 timers (2) connects ISET current settings signal end, the TRIG end of 555 timers (2) connects pwm pulse bandwidth modulation signals, the OUT end of 555 timers (2) connects metal-oxide-semiconductor drive circuit, pwm pulse bandwidth modulation signals connects the RES end of 555 timers (2) simultaneously, the utility model compared with the existing technology, employing discrete component is built, simple circuit is compact, not only can accelerate the speed of response of oil sucting valve, final raising rail pressure control precision, and PWM frequency is controlled, and current setting value is controlled, Current rise declines rapidly, and PWM cycle control signal can limit maximum duty cycle simultaneously.
Description
[technical field]
The utility model relates to oil sucting valve control circuit technical field, specifically a kind of oil sucting valve current closed-loop control circuit.
[background technique]
Most of automobile-used ECU do not adopt current closed-loop to the control of oil sucting valve, and reason is that automobile-used oil-fired system fuel delivery is little, and oil sucting valve quality is little, and motion delay is little, and reaction is fast, so directly control in PWM mode.Yet, the oil-fired system that oil drilling is used, because fuel delivery is large, oil sucting valve quality is large, motion delay is large, reaction is slow, if only use PWM mode to control, oil sucting valve reaction is slow, rail pressure control weak effect.
In addition, because current closed-loop is only controlled and need to be just necessary in large-scale oil-fired system, using scope is less, therefore lacks special-purpose hardware controls IC.And the hardware controls that will realize current closed-loop must be built voluntarily with discrete component, if can realize this measure, will have very important significance in related domain.
[model utility content]
The purpose of this utility model is exactly will solve above-mentioned deficiency and a kind of oil sucting valve current closed-loop control circuit is provided, can accelerate the speed of response of oil sucting valve, finally improve rail pressure control precision, and PWM frequency is controlled, current setting value is controlled, and Current rise declines rapidly.
Design for achieving the above object a kind of oil sucting valve current closed-loop control circuit, in described current closed-loop control circuit, be provided with operational amplifier 1 and 555 timer 2s, described operational amplifier 1 forms differential amplifier circuit, the output terminal of described operational amplifier 1 connects the THRES end of 555 timer 2s, the CON end of described 555 timer 2s connects ISET current settings signal end, the TRIG end of described 555 timer 2s connects pwm pulse bandwidth modulation signals, and the OUT end of described 555 timer 2s connects metal-oxide-semiconductor drive circuit.
Described pwm pulse bandwidth modulation signals connects the RES end of 555 timer 2s simultaneously.
Described metal-oxide-semiconductor drive circuit comprises MOS MOS field effect transistor 3, NPN type triode 4 and diode 5, the OUT end of described 555 timer 2s connects the base stage of NPN type triode 4, the collector electrode of described NPN type triode 4 connects respectively grid and the drain electrode of MOS MOS field effect transistor 3, the grid of described MOS MOS field effect transistor 3 is connected with drain electrode, the grounded-emitter connection of described NPN type triode 4, the source electrode of described MOS MOS field effect transistor 3 connects diode 5.
Compared with the existing technology, tool has the following advantages the utility model:
(1) adopt discrete component to build, simple circuit is compact, only uses an operational amplifier and a TLC555 timer, and these two elements are universal component, is very easy to obtain, and possesses production domesticization ability, is applicable to military products;
(2) the PWM cycle controlled continuously, current setting value is adjustable continuously;
(3) PWM cycle control signal can limit maximum duty cycle simultaneously;
(4) current-responsive is rapid, and current settings step response (1A->2A) is brought up to 15ms from 30ms.
To sum up: the oil sucting valve drive circuit that a kind of current closed-loop described in the utility model is controlled, not only can accelerate the speed of response of oil sucting valve, the final rail pressure control precision that improves, and PWM frequency is controlled, current setting value is controlled, Current rise declines rapidly, and PWM cycle control signal can limit maximum duty cycle simultaneously.
[accompanying drawing explanation]
Fig. 1 is circuit theory schematic diagram of the present utility model;
In figure: 1, operational amplifier 2,555 timers 3, MOS MOS field effect transistor 4, NPN type triode 5, diode.
[embodiment]
Below in conjunction with accompanying drawing, the utility model is done to following further illustrating:
As shown in Figure 1, in current closed-loop control circuit described in the utility model, be provided with operational amplifier 1 and 555 timer 2s, operational amplifier 1 forms differential amplifier circuit, the output terminal of operational amplifier 1 connects the THRES end (threshold value end) of 555 timer 2s, the CON end of 555 timer 2s connects ISET current settings signal end, the TRIG end (trigger end) of 555 timer 2s connects pwm pulse bandwidth modulation signals, the OUT end (output terminal) of 555 timer 2s connects metal-oxide-semiconductor drive circuit, pwm pulse bandwidth modulation signals connects the RES end (reset terminal) of 555 timer 2s simultaneously, DISC end (discharge end) ground connection of 555 timers, the vdd terminal of 555 timers connects VCC power supply, wherein, metal-oxide-semiconductor drive circuit comprises MOS MOS field effect transistor 3, NPN type triode 4 and diode 5, the OUT end of 555 timer 2s connects the base stage of NPN type triode 4, the collector electrode of NPN type triode 4 connects respectively grid and the drain electrode of MOS MOS field effect transistor 3, the grid of MOS MOS field effect transistor 3 is connected with drain electrode, the grounded-emitter connection of NPN type triode 4, the source electrode of MOS MOS field effect transistor 3 connects diode 5.
The utility model is as high-power common rail diesel engine oil sucting valve control circuit, it forms oil sucting valve current control circuit with a TLC555 timer and operational amplifier, with operational amplifier, form a differential amplification electric current, be used for gathering the electric current of electromagnet coil, electric current after amplification outputs to the THRES end of TLC555 timer, the analog amount corresponding to CON end input current setting signal of TLC555 timer, the TRIG end input PWM cycle control signal of TLC555 timer, the output terminal of TLC555 timer is in order to control metal-oxide-semiconductor drive circuit, indirectly control metal-oxide-semiconductor break-make.PWM cycle control signal connects the RES end of TLC555 timer simultaneously, and when cycle control signal is high level, TLC555 timer is output low level always, and metal-oxide-semiconductor is closed, thereby has limited maximum duty cycle.
When PWM cycle control signal occurs after trailing edge, the output terminal of TLC555 timer output high level, metal-oxide-semiconductor conducting, electromagnet current rises; When the electric current of electromagnet surpasses after setting value, the output voltage of current differential amplifier, higher than the voltage of the THRES end of TLC555 timer, causes TLC555 timer output low level, and metal-oxide-semiconductor is closed, and electric current starts to decline.
In the utility model, PWM frequency is controlled, and current setting value is controlled, and Current rise declines rapidly, and PWM cycle control signal can limit maximum duty cycle simultaneously; Metal-oxide-semiconductor is metal-oxide semiconductor fieldeffect transistor, is divided into N raceway groove and P raceway groove two classes, generally as switching mode device, uses; Im is current analog amount collection signal; Iset is current settings signal; PWM, the pwm signal of dutycycle 5%, 0 to 5V, output high level turn-offs metal-oxide-semiconductor.
The utility model is not subject to the restriction of above-mentioned mode of execution; other any do not deviate from change, the modification done under Spirit Essence of the present utility model and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection domain of the present utility model.
Claims (3)
1. an oil sucting valve current closed-loop control circuit, it is characterized in that: in described current closed-loop control circuit, be provided with operational amplifier (1) and 555 timers (2), described operational amplifier (1) forms differential amplifier circuit, the output terminal of described operational amplifier (1) connects the THRES end of 555 timers (2), the CON end of described 555 timers (2) connects ISET current settings signal end, the TRIG end of described 555 timers (2) connects pwm pulse bandwidth modulation signals, and the OUT end of described 555 timers (2) connects metal-oxide-semiconductor drive circuit.
2. oil sucting valve current closed-loop control circuit as claimed in claim 1, is characterized in that: described pwm pulse bandwidth modulation signals connects the RES end of 555 timers (2) simultaneously.
3. oil sucting valve current closed-loop control circuit as claimed in claim 2, it is characterized in that: described metal-oxide-semiconductor drive circuit comprises MOS MOS field effect transistor (3), NPN type triode (4) and diode (5), the OUT end of described 555 timers (2) connects the base stage of NPN type triode (4), the collector electrode of described NPN type triode (4) connects respectively grid and the drain electrode of MOS MOS field effect transistor (3), the grid of described MOS MOS field effect transistor (3) is connected with drain electrode, the grounded-emitter connection of described NPN type triode (4), the source electrode of described MOS MOS field effect transistor (3) connects diode (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420441726.4U CN204004685U (en) | 2014-08-05 | 2014-08-05 | Oil sucting valve current closed-loop control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420441726.4U CN204004685U (en) | 2014-08-05 | 2014-08-05 | Oil sucting valve current closed-loop control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204004685U true CN204004685U (en) | 2014-12-10 |
Family
ID=52044688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420441726.4U Expired - Lifetime CN204004685U (en) | 2014-08-05 | 2014-08-05 | Oil sucting valve current closed-loop control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204004685U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109391188A (en) * | 2018-10-18 | 2019-02-26 | 深圳市优必选科技有限公司 | Control circuit and device for reducing power supply peak value of direct current motor |
-
2014
- 2014-08-05 CN CN201420441726.4U patent/CN204004685U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109391188A (en) * | 2018-10-18 | 2019-02-26 | 深圳市优必选科技有限公司 | Control circuit and device for reducing power supply peak value of direct current motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141210 |
|
| CX01 | Expiry of patent term |