CN204741405U - A converting circuit frequently presses for converter - Google Patents
A converting circuit frequently presses for converter Download PDFInfo
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- CN204741405U CN204741405U CN201520373957.0U CN201520373957U CN204741405U CN 204741405 U CN204741405 U CN 204741405U CN 201520373957 U CN201520373957 U CN 201520373957U CN 204741405 U CN204741405 U CN 204741405U
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- frequency conversion
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Abstract
The utility model discloses a converting circuit frequently presses for converter, include: control chip U1, resistance R2, resistance R4 and electric capacity C1, wherein, control chip U1's model is NJM4151, resistance R2's one end and outside analog signal input are connected, and resistance R2's the other end is connected with control chip U1's the 7th pin, control chip U1's the 3rd pin is the data signal output after the conversion, control chip U1's the 8th pin and external power power are connected, control chip U1's the 4th pin ground connection, control chip U1's the 5th pin is connected with the external power power through resistance R4 to through electric capacity C1 ground connection. Implement the beneficial effects of the utility model are that, the circuit is simple, with low costs, the circuit is small, and the stable performance is reliable.
Description
Technical field
The utility model relates to frequency converter field, more particularly, relates to a kind of voltage-frequency conversion circuit for frequency converter.
Background technology
At present, in the circuit of some frequency converters, by the restricted number of the AD mouth of chip own, or for jamproof consideration, A/D module can be adopted to convert analog signals to digital signal.But the general A/D module of prior art is all larger, and price is also higher, quality is also that quality differs.Therefore, use the A/D module of prior art the complex structure of system, volume can be caused to increase and then affect the volume of whole product, and the higher price also high production cost having influence on whole product.In addition, uncontrollable due to quality, result also in the unsteadiness of whole product.
Therefore, prior art existing defects, needs to improve.
Utility model content
The technical problems to be solved in the utility model is, high in cost of production defect large for the above-mentioned A/D module complex structure of prior art, volume, provides a kind of voltage-frequency conversion circuit for frequency converter.
The utility model solves the technical scheme that its technical problem adopts: construct a kind of voltage-frequency conversion circuit for frequency converter, comprising: control chip, resistance R2, resistance R4 and electric capacity C1; Wherein, the model of control chip is NJM4151;
One end of resistance R2 is connected with external analog signal input, and the other end of resistance R2 is connected with the 7th pin of control chip; 3rd pin of control chip is the digital signal output end after conversion;
8th pin of control chip is connected with externally fed power supply, the 4th pin ground connection of control chip U1;
5th pin of control chip is connected with externally fed power supply through resistance R4, and through electric capacity C1 ground connection;
External analog signal, through the 7th pin of resistance R2 input control chip, carries out being exported by the 3rd pin after voltage-frequency conversion through control chip; Described resistance R4 and electric capacity C1 controls the output frequency of the 3rd pin of control chip.
Preferably, described voltage-frequency conversion circuit also comprises: electric capacity C2 and resistance R1;
The 7th of described control chip draws foot meridian capacitor C2 ground connection; External analog signal input is connected with one end of resistance R1; The other end ground connection of resistance R1.
Preferably, described voltage-frequency conversion circuit also comprises: voltage stabilizing didoe Z1;
7th pin of described control chip is connected with the negative electrode of voltage stabilizing didoe Z1; The plus earth of voltage stabilizing didoe Z1.
Preferably, described voltage-frequency conversion circuit also comprises: resistance R5, resistance R3 and electric capacity C3;
1st pin of described control chip through resistance R5 and electric capacity C3 ground connection, and is connected with the 6th pin of control chip U1; 6th pin of control chip is through resistance R3 ground connection.
Preferably, described voltage-frequency conversion circuit also comprises: resistance R6;
2nd pin of described control chip is through resistance R6 ground connection.
Preferably, described voltage-frequency conversion circuit also comprises: resistance R7;
3rd pin of described control chip is connected with externally fed power supply through resistance R7.
Implement the voltage-frequency conversion circuit for frequency converter of the present utility model, there is following beneficial effect: circuit is simple, cost is low, circuit volume is little, stable and reliable for performance.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is the circuit structure diagram of the voltage-frequency conversion circuit for frequency converter of the utility model embodiment.
Embodiment
In order to there be understanding clearly to technical characteristic of the present utility model, object and effect, now contrast accompanying drawing and describe embodiment of the present utility model in detail.
It is the circuit structure diagram of the voltage-frequency conversion circuit for frequency converter of the utility model embodiment see Fig. 1.The voltage-frequency conversion circuit of the utility model embodiment comprises: control chip U1, resistance R1 ~ R7, electric capacity C1 ~ C4.Wherein, the model of control chip U1 is NJM4151, and it comprises 8 pins.
Concrete, one end of resistance R2 is connected with external analog signal input, and the other end of resistance R2 is connected with the 7th pin of control chip U1; 3rd pin of control chip U1 is the digital signal output end after conversion; 8th pin of control chip U1 is connected with externally fed power supply, and through electric capacity C4 ground connection.The 4th pin ground connection of control chip U1, thus, for the 4th pin of control chip U1 and the 8th pin provide outside starting resistor (such as ,+15V voltage, wherein the 4th pin is power supply negative terminal, and the 8th pin is power positive end); 5th pin of control chip U1 is connected with externally fed power supply through resistance R4, and through electric capacity C1 ground connection; The 7th of control chip U1 draws foot meridian capacitor C2 ground connection; External analog signal input is connected with one end of resistance R1; The other end ground connection of resistance R1; 7th pin of control chip U1 is connected with the negative electrode of voltage stabilizing didoe Z1; The plus earth of voltage stabilizing didoe Z1; 1st pin of control chip U1 through resistance R5 and electric capacity C3 ground connection, and is connected with the 6th pin of control chip U1; 6th pin of control chip U1 is through resistance R3 ground connection; 2nd pin of control chip U1 is through resistance R6 ground connection; 3rd pin of control chip U1 is connected with externally fed power supply through resistance R7.
In the utility model embodiment, externally fed power supply is+15V power supply.
The operation principle of the voltage-frequency conversion circuit for frequency converter of the utility model embodiment is:
External analog signal (such as, 0V ~ 10V d. c. voltage signal), through the 7th pin of resistance R2 input control chip U1, carries out being exported by the 3rd pin after voltage-frequency conversion through control chip U1.Resistance R4 and electric capacity C1 controls the output frequency of the 3rd pin of control chip U1.
1st pin of control chip U1 makes a current source through resistance R5 and electric capacity C3, and the 6th pin for control chip U1 carries out threshold values control.
2nd pin of control chip U1 is through earth resistance R6 ground connection, and resistance R6 determines the internal operating current of control chip U1.
7th pin of voltage stabilizing didoe Z1 to control chip U1 is protected, and avoids too high voltage that control chip U1 is damaged.Voltage stabilizing didoe Z1 also carries out restriction input to outside analog quantity, and after avoiding too high voltage transitions, control chip the 3rd pin output frequency is too high, can not identify.
Resistance R1, resistance R2 and electric capacity C2 are used for when outside input is unsettled, and maintenance input signal is 0V, when outside has voltage to input, filter the burr and spike that disturb and cause, play one and suppress interference effect.
The voltage-frequency conversion circuit for frequency converter of the utility model embodiment adopts special voltage-frequency conversion IC (NJM4151), and circuit is simple, cost is low, circuit volume is little, stable and reliable for performance.
By reference to the accompanying drawings embodiment of the present utility model is described above; but the utility model is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; instead of it is restrictive; those of ordinary skill in the art is under enlightenment of the present utility model; do not departing under the ambit that the utility model aim and claim protect, also can make a lot of form, these all belong within protection of the present utility model.
Claims (6)
1. for a voltage-frequency conversion circuit for frequency converter, it is characterized in that, comprising: control chip U1, resistance R2, resistance R4 and electric capacity C1; Wherein, the model of control chip U1 is NJM4151;
One end of resistance R2 is connected with external analog signal input, and the other end of resistance R2 is connected with the 7th pin of control chip U1; 3rd pin of control chip U1 is the digital signal output end after conversion;
8th pin of control chip U1 is connected with externally fed power supply, the 4th pin ground connection of control chip U1;
5th pin of control chip U1 is connected with externally fed power supply through resistance R4, and through electric capacity C1 ground connection;
External analog signal, through the 7th pin of resistance R2 input control chip U1, carries out being exported by the 3rd pin after voltage-frequency conversion through control chip U1; Described resistance R4 and electric capacity C1 controls the output frequency of the 3rd pin of control chip U1.
2. voltage-frequency conversion circuit according to claim 1, is characterized in that, described voltage-frequency conversion circuit also comprises: electric capacity C2 and resistance R1;
The 7th of described control chip U1 draws foot meridian capacitor C2 ground connection; External analog signal input is connected with one end of resistance R1; The other end ground connection of resistance R1.
3. voltage-frequency conversion circuit according to claim 2, is characterized in that, described voltage-frequency conversion circuit also comprises: voltage stabilizing didoe Z1;
7th pin of described control chip U1 is connected with the negative electrode of voltage stabilizing didoe Z1; The plus earth of voltage stabilizing didoe Z1.
4. voltage-frequency conversion circuit according to claim 3, is characterized in that, described voltage-frequency conversion circuit also comprises: resistance R5, resistance R3 and electric capacity C3;
1st pin of described control chip U1 through resistance R5 and electric capacity C3 ground connection, and is connected with the 6th pin of control chip U1; 6th pin of control chip U1 is through resistance R3 ground connection.
5. voltage-frequency conversion circuit according to claim 4, is characterized in that, described voltage-frequency conversion circuit also comprises: resistance R6;
2nd pin of described control chip U1 is through resistance R6 ground connection.
6. voltage-frequency conversion circuit according to claim 5, is characterized in that, described voltage-frequency conversion circuit also comprises: resistance R7;
3rd pin of described control chip U1 is connected with externally fed power supply through resistance R7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520373957.0U CN204741405U (en) | 2015-06-02 | 2015-06-02 | A converting circuit frequently presses for converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520373957.0U CN204741405U (en) | 2015-06-02 | 2015-06-02 | A converting circuit frequently presses for converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204741405U true CN204741405U (en) | 2015-11-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520373957.0U Active CN204741405U (en) | 2015-06-02 | 2015-06-02 | A converting circuit frequently presses for converter |
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| Country | Link |
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| CN (1) | CN204741405U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113114211A (en) * | 2021-04-26 | 2021-07-13 | 石家庄通合电子科技股份有限公司 | Voltage-frequency conversion circuit and sensor |
-
2015
- 2015-06-02 CN CN201520373957.0U patent/CN204741405U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113114211A (en) * | 2021-04-26 | 2021-07-13 | 石家庄通合电子科技股份有限公司 | Voltage-frequency conversion circuit and sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A converting circuit frequently presses for converter Effective date of registration: 20191210 Granted publication date: 20151104 Pledgee: Shenzhen SME financing Company limited by guarantee Pledgor: SHENZHEN SINCREA ELECTRICAL TECHNOLOGY CO., LTD. Registration number: Y2019990000691 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |