CN204143287U - A kind of Novel electric potential source and current source sequential circuit - Google Patents
A kind of Novel electric potential source and current source sequential circuit Download PDFInfo
- Publication number
- CN204143287U CN204143287U CN201420554629.6U CN201420554629U CN204143287U CN 204143287 U CN204143287 U CN 204143287U CN 201420554629 U CN201420554629 U CN 201420554629U CN 204143287 U CN204143287 U CN 204143287U
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- circuit
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- current source
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Abstract
The purpose of this utility model is to provide a kind of Novel electric potential source and current source sequential circuit, comprising: impressed voltage 24v, voltage source circuit, current source circuit, voltage-regulating circuit, closed control circuit, and external resistor is formed.It is characterized in that: described voltage source and current source series circuit, its input end string has a voltage-regulating circuit, and rear end is connected to closed control circuit, and closed loop circuit acts on current loop circuit, ensures that current output value is constant.
Description
Technical field
The utility model relates to a kind of Novel electric potential source and current source sequential circuit, the occasion of the transmitter circuit application of particularly suitable two-wire system.
Background technology
Existing voltage source and current source sequential circuit; general current source circuit adopts device symmetry to realize steady flow result; this circuit temperature influence is large; the current values in after-current source is connected in series under environmental parameter situation of change with voltage source; be difficult to the effect reaching constant current output; if be used on two-wire system transformer, transmitter output valve error often can be caused larger.
In view of above-mentioned technical deficiency, the purpose of this utility model is to provide a kind of Novel electric potential source and current source sequential circuit, and its voltage source is connected in series with current source, and the output valve of current source is that an electric current loop closed loop exports.Almost a desirable current source when feedback element is little by such environmental effects.
Summary of the invention
the utility model adopts following scheme to realize: the utility model relates to a kind of Novel electric potential source current source series circuit, comprising: impressed voltage 24v, voltage source circuit, current source circuit, voltage-regulating circuit, closed control circuit, and external resistor is formed.It is characterized in that: described voltage source and current source series circuit, its input end string has a voltage-regulating circuit, Constant Electric Current routing resistance R
1photoelectric coupling circuit V
2form, mu balanced circuit is by stabilivolt V
3form, closed-loop control core is made up of SG3525 integrated circuit, is transmitter circuit in empty frame.
The utility model circuit is simple, and because current source output detections adopts photoelectric coupling circuit, ensure that major loop is separated with control loop, current value is adjusted by PWM mode, and make current source export numerical stability, the linearity is better, has good use value.
Accompanying drawing explanation
Fig. 1 is the utility model circuit theory schematic diagram.
Fig. 2 is the utility model circuit embodiments circuit diagram.
Embodiment
As shown in Figure 1, the purpose of this utility model is to provide a kind of Novel electric potential source and current source sequential circuit, comprising: impressed voltage 24v, voltage source circuit, current source circuit, voltage-regulating circuit, closed control circuit, and external resistor is formed.It is characterized in that: described voltage source and current source series circuit, its input end string has a voltage-regulating circuit, and rear end is connected to closed control circuit, and closed loop circuit acts on current loop circuit, ensures that current output value is constant.
Fig. 2 is specific embodiment circuit diagram, and additional direct current 24V is added in circuit input end, and voltage-regulating circuit is by L1 inductance, and VT transistor, V1 diode, electric capacity C1 is formed.Constant Electric Current routing resistance R
1photoelectric coupling circuit V
2form, mu balanced circuit is by stabilivolt V
3form, closed-loop control core is made up of SG3525 integrated circuit, is transmitter circuit in empty frame.
In fig. 2, SG3525 control input end accepts the set-point of the current source that source of stable pressure dividing potential drop is formed, and value of feedback is determined by V2 photoelectrical coupler secondary currents numerical value.If there is deviation in the numerical value of current source and set-point, SG3525 will export corresponding pwm signal, this signal function is in VT transistor, this pipe break-make controls to change with regard to applied voltage Circuit tuning to flow through the former side's electric current of R1 and V2 photoelectrical coupler, also V2 secondary currents is changed, until the voltage of SG3525 two input ends is consistent.So just ensure constant current source numerical stability.This circuit also ensures when inputting 24V voltage and changing within the specific limits, and output current source numerical value also can be consistent with set-point.
L1 inductance, VT transistor, V1 diode, electric capacity C1, V2 photoelectrical coupler, V3 stabilivolt, R1 resistance, setting valve and value of feedback all will be selected according to constant current source output valve.Empty frame part is transmitter electrical schematic diagram.
The foregoing is only preferred embodiment of the present utility model, all equalizations done according to the utility model claim change and modify, and all should belong to covering scope of the present utility model.
Claims (2)
1. a Novel electric potential source and current source sequential circuit, comprise: impressed voltage 24v, voltage source circuit, current source circuit, voltage-regulating circuit, closed control circuit, external resistor is formed, and it is characterized in that: described voltage source and current source series circuit, its input end string has a voltage-regulating circuit, rear end is connected to closed control circuit, and closed loop circuit acts on current loop circuit, ensures that current output value is constant.
2. a kind of Novel electric potential source according to claim 1 and current source sequential circuit, it is characterized in that the detection means of closed control circuit adopts photoelectrical coupler, closed-loop control core adopts SG3525 integrated circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420554629.6U CN204143287U (en) | 2014-09-25 | 2014-09-25 | A kind of Novel electric potential source and current source sequential circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420554629.6U CN204143287U (en) | 2014-09-25 | 2014-09-25 | A kind of Novel electric potential source and current source sequential circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204143287U true CN204143287U (en) | 2015-02-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420554629.6U Expired - Fee Related CN204143287U (en) | 2014-09-25 | 2014-09-25 | A kind of Novel electric potential source and current source sequential circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN204143287U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI585566B (en) * | 2015-03-19 | 2017-06-01 | 鴻富錦精密工業（武漢）有限公司 | Direct current power control system and method |
-
2014
- 2014-09-25 CN CN201420554629.6U patent/CN204143287U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI585566B (en) * | 2015-03-19 | 2017-06-01 | 鴻富錦精密工業（武漢）有限公司 | Direct current power control system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150204 Termination date: 20170925 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |