CN209184575U - A kind of solenoid valve flow control driving circuit based on integrated switch voltage stabilizing chip - Google Patents
A kind of solenoid valve flow control driving circuit based on integrated switch voltage stabilizing chip Download PDFInfo
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- CN209184575U CN209184575U CN201920075082.4U CN201920075082U CN209184575U CN 209184575 U CN209184575 U CN 209184575U CN 201920075082 U CN201920075082 U CN 201920075082U CN 209184575 U CN209184575 U CN 209184575U
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Abstract
The utility model discloses a kind of solenoid valve flow control driving circuit based on integrated switch voltage stabilizing chip, voltage stabilizing chip includes CB pin, FB pin and VSW pin, the CB pin is connected to voltage output end by capacitor one, the FB pin is connected to the output end of operational amplifier, the VSW pin is connected to resistance one, the resistance one is in parallel with capacitor two and resistance one and capacitor two are connected to the non-inverting input terminal of operational amplifier, the resistance one is connected in series to voltage output end with solenoid valve and resistance one is grounded, the inverting input terminal of the operational amplifier is connected to bleeder circuit and amplifier integrating circuit, the amplifier integrating circuit includes resistance two and capacitor three, the resistance two and the series connection of capacitor three and the end of resistance two and capacitor three are connected to the input terminal of the operational amplifier.Driving method ratio pwm driving method described in the utility model is compared, and control response speed is fast, and precision is high, and stability is high.
Description
Technical field
The utility model relates to Solenoid Valve Technology field more particularly to a kind of solenoid valves based on integrated switch voltage stabilizing chip
Flow control driving circuit.
Background technique
Electromagnetic coil is the coil for generating magnetic field.We be normally referred to as solenoidal equipment be using coil and by iron or
Sometimes the equipment of mobile core made of another magnetic material.To coil apply electric current can make iron core drawn relative to coil or
It pushes away, leads to the movement for driving object in mechanical system.One typical electromagnetic coil generates the coil in magnetic field by one
Composition.When starting solenoid, voltage is applied on winding to generate magnetic field.Since winding has biggish inductance,
Electric current needs a period of time that could be formed.Power on electromagnetic core is directly proportional to electric current.Magnetic is moved in order to generate maximum power
Core, it is necessary to apply high voltage on winding quickly to establish electric current.Once much smaller electricity usually can be used after the completion of movement
Magnetic core is secured in position by stream.If electric current does not reduce, sizable power can be consumed in winding, and solenoid can generate largely
Heat.In order to solve these problems, constant-flow driver can be used to drive electromagnetic coil.Electric current can control at any time,
To provide the power of ideal movement and limit consumption to keep electromagnetic coil in place.One of common PWM control is simple
The most straightforward procedure of electromagnetic driver drive magnetic valve is to open and close electric current.This usually passes through a low-side MOSFET switch
It is completed with electric current recycling diode.In the circuit, electric current is only limited by the supply voltage of electromagnetic coil and D.C. resistance.
The problem of driving electromagnetic coil is exactly switching current in its simplest form, the electromechanical properties of simple driver are restricted.By
Apply within 100% time in whole voltage and currents, pulls in the limitation that electric current is continued power consumption ratings by solenoid.Line
The big inductance of circle also limits electric current increased speed when electromagnetic coil starts for the first time.
Utility model content
(1) the technical issues of solving
In view of the deficiencies of the prior art, the utility model provides a kind of solenoid valve stream based on integrated switch voltage stabilizing chip
Driving circuit is controlled, the driving method presence for solving general pwm circuit pulls in electric current and continued power consumption ratings by solenoid
Limitation, the problem of big inductance of coil also limits electric current increased speed when electromagnetic coil starts for the first time.
(2) technical solution
To achieve the above object, the utility model provides the following technical solutions: a kind of based on integrated switch voltage stabilizing chip
Solenoid valve flow control driving circuit, including voltage stabilizing chip, resistance one, resistance two and operational amplifier, the voltage stabilizing chip include
CB pin, FB pin and VSW pin, the CB pin are connected to voltage output end, the FB pin connection by capacitor one
To the output end of operational amplifier, the VSW pin is connected to resistance one, the resistance one is in parallel with capacitor two and resistance one with
Capacitor two is connected to the non-inverting input terminal of operational amplifier, and the resistance one is connected in series to voltage output end and electricity with solenoid valve
One ground connection of resistance, the inverting input terminal of the operational amplifier are connected to bleeder circuit and amplifier integrating circuit, the amplifier product
Parallel circuit includes resistance two and capacitor three, and the resistance two and the series connection of capacitor three and the end of resistance two and capacitor three are connected to institute
State the input terminal of operational amplifier.
Preferably, the bleeder circuit includes resistance three, resistance four, the resistance three and resistance four is in parallel and three He of resistance
The end of resistance four is connected to the inverting input terminal of capacitor four and operational amplifier, and the resistance three is connected to analog voltage, institute
It states resistance four and capacitor four is grounded.
Preferably, the VIN pin of the voltage stabilizing chip is connected to extraneous power supply, and the GND pin of the voltage stabilizing chip is grounded,
The ON/OFF pin of the voltage stabilizing chip is connected to extraneous power supply by resistance five.
Preferably, the voltage output end is grounded by zener diode.
Preferably, the resistance value of the resistance one is 1 Ω, and the resistance value of the resistance two is 100k Ω, the resistance of the resistance three
Value is 6.8k Ω；The resistance value of the resistance four is 1.8k Ω；The resistance value of the resistance five is 10k Ω, the capacitor of the capacitor one
Value is 103UF, and the capacitance of the capacitor two is 103UF, and the capacitance of the capacitor three is 334UF, the electricity of the capacitor four
Capacitance is 104UF.
Preferably, the model LM2674-ADJ of the voltage stabilizing chip, the model OPA2180 of the operational amplifier.
(3) beneficial effect
The utility model provides a kind of solenoid valve flow control driving circuit based on integrated switch voltage stabilizing chip, have with
Down the utility model has the advantages that the voltage stabilizing chip that the utility model selects is LM2674-ADJ, voltage stabilizing chip can drive 500 milliamperes of load
Electric current has good route and load regulation.LM2674-ADJ voltage stabilizing chip, it is by feedback pin FB, shunt voltage is anti-
Feedback is changed to series current feedback, so that constant voltage circuit is changed into constant-current control circuit, it is faster than pwm mode control response speed,
Precision is high, and stability is high, and for the utility model using LM2674-ADJ voltage stabilizing chip as core, resistance one is that feedback resistance uses precision
Alloy power resistor, selecting size is 1 ohm, and resistance one is connected with solenoid valve.Operational amplifier is feedback control circuit, DAC-
The analog voltage that A is DAC exports, and provides voltage for bleeder circuit.It selects control terminal design in negative phase end, feedback can be increased
Input impedance, reduces influence of the feed circuit to main circuit, and the bleeder circuit that resistance three and resistance four form contracts the voltage of ADC
Small, then resistance two and capacitor three form amplifier and form integrating circuit, reduce that amplifier Open loop gain cofficient is excessive toning occurs.
Detailed description of the invention
Fig. 1 is the circuit diagram of the utility model.
In figure: 1, voltage stabilizing chip；2, operational amplifier；3, resistance one；4, resistance two；5, resistance three；6, resistance four；7, electric
Resistance five；8, capacitor one；9, capacitor two；10, capacitor three；11, capacitor four；12, solenoid valve.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
As shown in Figure 1, it is proposed that following embodiments: a kind of solenoid valve flow control driving electricity based on integrated switch voltage stabilizing chip
Road, including voltage stabilizing chip 1, resistance 1, resistance 24 and operational amplifier 2, the voltage stabilizing chip 1 are drawn including CB pin, FB
Foot and VSW pin, the CB pin are connected to voltage output end by capacitor 1, and the FB pin is connected to operation amplifier
The output end of device 2, the VSW pin are connected to resistance 1, and the resistance 1 is in parallel with capacitor 29 and resistance 1 and capacitor
29 are connected to the non-inverting input terminal of operational amplifier 2, the resistance 1 and solenoid valve 12 be connected in series to voltage output end and
Resistance 1 is grounded, and the inverting input terminal of the operational amplifier 2 is connected to bleeder circuit and amplifier integrating circuit, the fortune
Putting integrating circuit includes resistance 24 and capacitor 3 10, the resistance 24 and the series connection of capacitor 3 10 and resistance 24 and capacitor 3 10
End be connected to the input terminal of the operational amplifier 2.
In the present embodiment, the bleeder circuit includes resistance 35, resistance 46, and the resistance 35 and resistance 46 are in parallel
And the end of resistance 35 and resistance 46 is connected to the inverting input terminal of capacitor 4 11 and operational amplifier 2, the resistance 35 connects
It is connected to analog voltage, the resistance 46 and capacitor 4 11 are grounded.
In the present embodiment, the VIN pin of the voltage stabilizing chip 1 is connected to extraneous power supply, the GND of the voltage stabilizing chip 1
The ON/OFF pin of pin ground connection, the voltage stabilizing chip 1 is connected to extraneous power supply by resistance 57.
In the present embodiment, the voltage output end is grounded by zener diode, keeps entire circuit safer.
In the present embodiment, the resistance value of the resistance 1 is 1 Ω, and the resistance value of the resistance 24 is 100k Ω, the electricity
The resistance value for hindering 35 is 6.8k Ω；The resistance value of the resistance 46 is 1.8k Ω；The resistance value of the resistance 57 is 10k Ω, the electricity
The capacitance for holding 1 is 103UF, and the capacitance of the capacitor 29 is 103UF, and the capacitance of the capacitor 3 10 is 334UF,
The capacitance of the capacitor 4 11 is 104UF；The model LM2674-ADJ of the voltage stabilizing chip 1, the operational amplifier 2
Model OPA2180
In Fig. 1, the voltage stabilizing chip that the utility model selects is LM2674-ADJ, and voltage stabilizing chip 1 can drive 500 milliamperes
Load current, have good route and load regulation.LM2674-ADJ voltage stabilizing chip 1 is by feedback pin FB electricity in parallel
Pressure feedback is changed to series current feedback, so that constant voltage circuit is changed into constant-current control circuit, than pwm mode control response speed
Fastly, precision is high, and stability is high, and the utility model is core with LM2674-ADJ voltage stabilizing chip 1, and resistance 1 makes for feedback resistance
With Precise Alloy power resistor, selecting size is 1 ohm, and resistance 1 is connected with solenoid valve 12.Operational amplifier 2 is feedback control
Circuit processed, the analog voltage that DAC-A is DAC export, and provide voltage for bleeder circuit.Select control terminal design in negative phase end, it can
To increase the input impedance of feedback, influence of the feed circuit to main circuit, the partial pressure electricity that resistance 35 and resistance 46 form are reduced
Road reduces the voltage of ADC, and then resistance 24 and capacitor 3 10 form amplifier and form integrating circuit, reduces amplifier open loop amplification
Multiple is excessive to there is toning.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.
Claims (6)
1. a kind of solenoid valve flow control driving circuit based on integrated switch voltage stabilizing chip, it is characterised in that: including voltage stabilizing chip
(1), resistance one (3), resistance two (4) and operational amplifier (2), the voltage stabilizing chip (1) include CB pin, FB pin and
VSW pin, the CB pin are connected to voltage output end by capacitor one (8), and the FB pin is connected to operational amplifier (2)
Output end, the VSW pin is connected to resistance one (3), the resistance one (3) be in parallel with capacitor two (9) and resistance one (3) with
Capacitor two (9) is connected to the non-inverting input terminal of operational amplifier (2), and the resistance one (3) is connected in series to solenoid valve (12)
Voltage output end and resistance one (3) are grounded, and the inverting input terminal of the operational amplifier (2) is connected to bleeder circuit and amplifier
Integrating circuit, the amplifier integrating circuit include resistance two (4) and capacitor three (10), the resistance two (4) and capacitor three (10)
Series connection and the end of resistance two (4) and capacitor three (10) are connected to the input terminal of the operational amplifier (2).
2. a kind of solenoid valve flow control driving circuit based on integrated switch voltage stabilizing chip according to claim 1, feature
Be: the bleeder circuit includes resistance three (5), resistance four (6), the resistance three (5) and resistance four (6) is in parallel and resistance three
(5) and the end of resistance four (6) is connected to the inverting input terminal of capacitor four (11) and operational amplifier (2), the resistance three (5)
It is connected to analog voltage, the resistance four (6) and capacitor four (11) ground connection.
3. a kind of solenoid valve flow control driving circuit based on integrated switch voltage stabilizing chip according to claim 1, feature
Be: the VIN pin of the voltage stabilizing chip (1) is connected to extraneous power supply, and the GND pin ground connection of the voltage stabilizing chip (1) is described
The ON/OFF pin of voltage stabilizing chip (1) is connected to extraneous power supply by resistance five (7).
4. a kind of solenoid valve flow control driving circuit based on integrated switch voltage stabilizing chip according to claim 1, feature
Be: the voltage output end is grounded by zener diode.
5. a kind of solenoid valve flow control based on integrated switch voltage stabilizing chip according to claim 1-4 drives electricity
Road, it is characterised in that: the resistance value of the resistance one (3) is 1 Ω, and the resistance value of the resistance two (4) is 100k Ω, the resistance three
(5) resistance value is 6.8k Ω；The resistance value of the resistance four (6) is 1.8k Ω；The resistance value of the resistance five (7) is 10k Ω, described
The capacitance of capacitor one (8) is 103UF, and the capacitance of the capacitor two (9) is 103UF, the capacitance of the capacitor three (10)
For 334UF, the capacitance of the capacitor four (11) is 104UF.
6. a kind of solenoid valve flow control driving circuit based on integrated switch voltage stabilizing chip according to claim 5, feature
It is: the model LM2674-ADJ, the model OPA2180 of the operational amplifier (2) of the voltage stabilizing chip (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920075082.4U CN209184575U (en) | 2019-01-17 | 2019-01-17 | A kind of solenoid valve flow control driving circuit based on integrated switch voltage stabilizing chip |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920075082.4U CN209184575U (en) | 2019-01-17 | 2019-01-17 | A kind of solenoid valve flow control driving circuit based on integrated switch voltage stabilizing chip |
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| Publication Number | Publication Date |
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| CN209184575U true CN209184575U (en) | 2019-07-30 |
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| CN201920075082.4U Active CN209184575U (en) | 2019-01-17 | 2019-01-17 | A kind of solenoid valve flow control driving circuit based on integrated switch voltage stabilizing chip |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113804266A (en) * | 2021-09-15 | 2021-12-17 | 河南卓正电子科技有限公司 | Ultrasonic flowmeter high-voltage transducer drive circuit |
-
2019
- 2019-01-17 CN CN201920075082.4U patent/CN209184575U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113804266A (en) * | 2021-09-15 | 2021-12-17 | 河南卓正电子科技有限公司 | Ultrasonic flowmeter high-voltage transducer drive circuit |
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